121002021100 has 18 divisors (see below), whose sum is σ = 262574386004. Its totient is φ = 48400808400.

The previous prime is 121002021079. The next prime is 121002021131. The reversal of 121002021100 is 1120200121.

121002021100 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×121002021100² (a number of 23 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 605010006 + ... + 605010205.

Almost surely, 2^121002021100 is an apocalyptic number.

121002021100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121002021100 is an abundant number, since it is smaller than the sum of its proper divisors (141572364904).

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

121002021100 is a wasteful number, since it uses less digits than its factorization.

121002021100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1210020225 (or 1210020218 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 121002021100 its reverse (1120200121), we get a palindrome (122122221221).

The spelling of 121002021100 in words is "one hundred twenty-one billion, two million, twenty-one thousand, one hundred".