121210220022210 has 320 divisors, whose sum is σ = 364382205264000. Its totient is φ = 28654990617600.

The previous prime is 121210220022139. The next prime is 121210220022253. The reversal of 121210220022210 is 12220022012121.

It is a happy number.

121210220022210 is a `hidden beast` number, since 1 + 2 + 1 + 210 + 220 + 0 + 22 + 210 = 666.

121210220022210 is digitally balanced in base 4, 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 (18).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 843428941 + ... + 843572639.

It is an arithmetic number, because the mean of its divisors is an integer number (1138694391450).

Almost surely, 2^{121210220022210} is an apocalyptic number.

121210220022210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121210220022210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182191102632000).

121210220022210 is an abundant number, since it is smaller than the sum of its proper divisors (243171985241790).

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

121210220022210 is a wasteful number, since it uses less digits than its factorization.

121210220022210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146079 (or 146070 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 121210220022210 its reverse (12220022012121), we get a palindrome (133430242034331).

The spelling of 121210220022210 in words is "one hundred twenty-one trillion, two hundred ten billion, two hundred twenty million, twenty-two thousand, two hundred ten".