121021211212100 has 72 divisors (see below), whose sum is σ = 272087837930496. Its totient is φ = 46674053280000.

The previous prime is 121021211212063. The next prime is 121021211212127. The reversal of 121021211212100 is 1212112120121.

It is a super-2 number, since 2×121021211212100² (a number of 29 digits) contains 22 as substring.

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 23 ways as a sum of consecutive naturals, for example, 71187761 + ... + 72867960.

Almost surely, 2^{121021211212100} is an apocalyptic number.

121021211212100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121021211212100 is an abundant number, since it is smaller than the sum of its proper divisors (151066626718396).

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

121021211212100 is a wasteful number, since it uses less digits than its factorization.

121021211212100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144056037 (or 144056030 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121021211212100 its reverse (1212112120121), we get a palindrome (122233323332221).

The spelling of 121021211212100 in words is "one hundred twenty-one trillion, twenty-one billion, two hundred eleven million, two hundred twelve thousand, one hundred".