121021222010100 has 72 divisors (see below), whose sum is σ = 350253457323168. Its totient is φ = 32263227100800.

The previous prime is 121021222010099. The next prime is 121021222010147. The reversal of 121021222010100 is 1010222120121.

It is a super-2 number, since 2×121021222010100² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 121021222010100.

It is a congruent number.

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, 55801431 + ... + 57929630.

Almost surely, 2^{121021222010100} is an apocalyptic number.

121021222010100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121021222010100 is an abundant number, since it is smaller than the sum of its proper divisors (229232235313068).

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

121021222010100 is a wasteful number, since it uses less digits than its factorization.

121021222010100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113734625 (or 113734618 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121021222010100 its reverse (1010222120121), we get a palindrome (122031444130221).

The spelling of 121021222010100 in words is "one hundred twenty-one trillion, twenty-one billion, two hundred twenty-two million, ten thousand, one hundred".