2120311111121 has 16 divisors (see below), whose sum is σ = 2479670880000. Its totient is φ = 1812260951424.

The previous prime is 2120311111063. The next prime is 2120311111133. The reversal of 2120311111121 is 1211111130212.

It is not a de Polignac number, because 2120311111121 - 2⁶ = 2120311111057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2120311111121.

It is not an unprimeable number, because it can be changed into a prime (2120311111021) 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, 8634821 + ... + 8876978.

It is an arithmetic number, because the mean of its divisors is an integer number (154979430000).

Almost surely, 2^{2120311111121} is an apocalyptic number.

It is an amenable number.

2120311111121 is a deficient number, since it is larger than the sum of its proper divisors (359359768879).

2120311111121 is an equidigital number, since it uses as much as digits as its factorization.

2120311111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17512173 (or 17512159 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 2120311111121 its reverse (1211111130212), we get a palindrome (3331422241333).

The spelling of 2120311111121 in words is "two trillion, one hundred twenty billion, three hundred eleven million, one hundred eleven thousand, one hundred twenty-one".