120121011111021 has 16 divisors (see below), whose sum is σ = 160347818594304. Its totient is φ = 79987460387184.

The previous prime is 120121011111019. The next prime is 120121011111097. The reversal of 120121011111021 is 120111110121021.

It is not a de Polignac number, because 120121011111021 - 2¹ = 120121011111019 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120121011113021) 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, 19658700 + ... + 25034106.

It is an arithmetic number, because the mean of its divisors is an integer number (10021738662144).

Almost surely, 2^{120121011111021} is an apocalyptic number.

It is an amenable number.

120121011111021 is a deficient number, since it is larger than the sum of its proper divisors (40226807483283).

120121011111021 is an equidigital number, since it uses as much as digits as its factorization.

120121011111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5384080.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 120121011111021 its reverse (120111110121021), we get a palindrome (240232121232042).

The spelling of 120121011111021 in words is "one hundred twenty trillion, one hundred twenty-one billion, eleven million, one hundred eleven thousand, twenty-one".