121010020021100 has 72 divisors (see below), whose sum is σ = 300106905762048. Its totient is φ = 41488865467200.

The previous prime is 121010020021039. The next prime is 121010020021123. The reversal of 121010020021100 is 1120020010121.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 118845155 + ... + 119859045.

Almost surely, 2^{121010020021100} is an apocalyptic number.

121010020021100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121010020021100 is an abundant number, since it is smaller than the sum of its proper divisors (179096885740948).

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

121010020021100 is a wasteful number, since it uses less digits than its factorization.

121010020021100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184415 (or 1184408 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121010020021100 its reverse (1120020010121), we get a palindrome (122130040031221).

The spelling of 121010020021100 in words is "one hundred twenty-one trillion, ten billion, twenty million, twenty-one thousand, one hundred".