121001210001100 has 288 divisors, whose sum is σ = 324773525664000. Its totient is φ = 38470893235200.

The previous prime is 121001210001071. The next prime is 121001210001127. The reversal of 121001210001100 is 1100012100121.

121001210001100 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1553269951 + ... + 1553347849.

It is an arithmetic number, because the mean of its divisors is an integer number (1127685853000).

Almost surely, 2^{121001210001100} is an apocalyptic number.

121001210001100 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 121001210001100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162386762832000).

121001210001100 is an abundant number, since it is smaller than the sum of its proper divisors (203772315662900).

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

121001210001100 is a wasteful number, since it uses less digits than its factorization.

121001210001100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83673 (or 83666 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 121001210001100 its reverse (1100012100121), we get a palindrome (122101222101221).

The spelling of 121001210001100 in words is "one hundred twenty-one trillion, one billion, two hundred ten million, one thousand, one hundred".