120000111021 has 12 divisors (see below), whose sum is σ = 198095421472. Its totient is φ = 68571491976.

The previous prime is 120000111019. The next prime is 120000111029. The reversal of 120000111021 is 120111000021.

It is a happy number.

It is not a de Polignac number, because 120000111021 - 2¹ = 120000111019 is a prime.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120000110994 and 120000111012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120000111029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 952381771 + ... + 952381896.

Almost surely, 2^120000111021 is an apocalyptic number.

It is an amenable number.

120000111021 is a deficient number, since it is larger than the sum of its proper divisors (78095310451).

120000111021 is a wasteful number, since it uses less digits than its factorization.

120000111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1904763680 (or 1904763677 counting only the distinct ones).

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

Adding to 120000111021 its reverse (120111000021), we get a palindrome (240111111042).

The spelling of 120000111021 in words is "one hundred twenty billion, one hundred eleven thousand, twenty-one".