120120021021 has 64 divisors (see below), whose sum is σ = 216328605696. Its totient is φ = 57254860800.

The previous prime is 120120020953. The next prime is 120120021031.

120120021021 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 120120021021 - 2¹⁰ = 120120019997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120120020988 and 120120021006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120120021031) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 381741 + ... + 621261.

It is an arithmetic number, because the mean of its divisors is an integer number (3380134464).

Almost surely, 2^120120021021 is an apocalyptic number.

120120021021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

120120021021 is a deficient number, since it is larger than the sum of its proper divisors (96208584675).

120120021021 is a wasteful number, since it uses less digits than its factorization.

120120021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239722.

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

It can be divided in two parts, 1201200 and 21021, that added together give a palindrome (1222221).

The spelling of 120120021021 in words is "one hundred twenty billion, one hundred twenty million, twenty-one thousand, twenty-one".