2120111220021 has 16 divisors (see below), whose sum is σ = 2926018824960. Its totient is φ = 1363863130560.

The previous prime is 2120111219981. The next prime is 2120111220041. The reversal of 2120111220021 is 1200221110212.

It is not a de Polignac number, because 2120111220021 - 2¹⁰ = 2120111218997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120111220041) 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 15 ways as a sum of consecutive naturals, for example, 7049725 + ... + 7344306.

It is an arithmetic number, because the mean of its divisors is an integer number (182876176560).

Almost surely, 2^{2120111220021} is an apocalyptic number.

It is an amenable number.

2120111220021 is a deficient number, since it is larger than the sum of its proper divisors (805907604939).

2120111220021 is a wasteful number, since it uses less digits than its factorization.

2120111220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14395756.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2120111220021 its reverse (1200221110212), we get a palindrome (3320332330233).

The spelling of 2120111220021 in words is "two trillion, one hundred twenty billion, one hundred eleven million, two hundred twenty thousand, twenty-one".