121230021221100 has 432 divisors, whose sum is σ = 420334206888960. Its totient is φ = 28979624678400.

The previous prime is 121230021221093. The next prime is 121230021221107. The reversal of 121230021221100 is 1122120032121.

121230021221100 is a `hidden beast` number, since 1 + 21 + 2 + 300 + 21 + 221 + 100 = 666.

121230021221100 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (121230021221093) and next prime (121230021221107).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (121230021221107) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 323176249 + ... + 323551151.

It is an arithmetic number, because the mean of its divisors is an integer number (972995849280).

Almost surely, 2^{121230021221100} is an apocalyptic number.

121230021221100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121230021221100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210167103444480).

121230021221100 is an abundant number, since it is smaller than the sum of its proper divisors (299104185667860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121230021221100 is a wasteful number, since it uses less digits than its factorization.

121230021221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375390 (or 375380 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 121230021221100 its reverse (1122120032121), we get a palindrome (122352141253221).

The spelling of 121230021221100 in words is "one hundred twenty-one trillion, two hundred thirty billion, twenty-one million, two hundred twenty-one thousand, one hundred".