120021021021 has 16 divisors (see below), whose sum is σ = 174598599168. Its totient is φ = 72730609200.

The previous prime is 120021021007. The next prime is 120021021077. The reversal of 120021021021 is 120120120021.

It is not a de Polignac number, because 120021021021 - 2⁵ = 120021020989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120021020988 and 120021021006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120021021721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28456 + ... + 490766.

It is an arithmetic number, because the mean of its divisors is an integer number (10912412448).

Almost surely, 2^120021021021 is an apocalyptic number.

120021021021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

120021021021 is a deficient number, since it is larger than the sum of its proper divisors (54577578147).

120021021021 is a wasteful number, since it uses less digits than its factorization.

120021021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470192.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 120021021021 its reverse (120120120021), we get a palindrome (240141141042).

The spelling of 120021021021 in words is "one hundred twenty billion, twenty-one million, twenty-one thousand, twenty-one".