120012020110021 has 12 divisors (see below), whose sum is σ = 135604011407328. Its totient is φ = 105963790327824.

The previous prime is 120012020110013. The next prime is 120012020110043. The reversal of 120012020110021 is 120011020210021.

It is not a de Polignac number, because 120012020110021 - 2³ = 120012020110013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120012020109983 and 120012020110010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120012020110321) 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, 15437611255 + ... + 15437619028.

It is an arithmetic number, because the mean of its divisors is an integer number (11300334283944).

Almost surely, 2^{120012020110021} is an apocalyptic number.

It is an amenable number.

120012020110021 is a deficient number, since it is larger than the sum of its proper divisors (15591991297307).

120012020110021 is a wasteful number, since it uses less digits than its factorization.

120012020110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30875230332 (or 30875230319 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 120012020110021 its reverse (120011020210021), we get a palindrome (240023040320042).

The spelling of 120012020110021 in words is "one hundred twenty trillion, twelve billion, twenty million, one hundred ten thousand, twenty-one".