120121011021 has 8 divisors (see below), whose sum is σ = 174721470624. Its totient is φ = 72800612720.

The previous prime is 120121011011. The next prime is 120121011077. The reversal of 120121011021 is 120110121021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 120121011021 - 2¹⁵ = 120120978253 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 120121010988 and 120121011006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120121011011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1820015286 + ... + 1820015351.

It is an arithmetic number, because the mean of its divisors is an integer number (21840183828).

Almost surely, 2^120121011021 is an apocalyptic number.

120121011021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

120121011021 is a deficient number, since it is larger than the sum of its proper divisors (54600459603).

120121011021 is a wasteful number, since it uses less digits than its factorization.

120121011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3640030651.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 120121011021 its reverse (120110121021), we get a palindrome (240231132042).

Subtracting from 120121011021 its reverse (120110121021), we obtain a square (10890000 = 3300²).

The spelling of 120121011021 in words is "one hundred twenty billion, one hundred twenty-one million, eleven thousand, twenty-one".