120021011100 has 54 divisors (see below), whose sum is σ = 376199194280. Its totient is φ = 32005602720.

The previous prime is 120021011093. The next prime is 120021011119. The reversal of 120021011100 is 1110120021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 66677440 + ... + 66679239.

Almost surely, 2^120021011100 is an apocalyptic number.

120021011100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120021011100 is an abundant number, since it is smaller than the sum of its proper divisors (256178183180).

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

120021011100 is a wasteful number, since it uses less digits than its factorization.

120021011100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133356699 (or 133356689 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 120021011100 its reverse (1110120021), we get a palindrome (121131131121).

The spelling of 120021011100 in words is "one hundred twenty billion, twenty-one million, eleven thousand, one hundred".