2311122121 has 16 divisors (see below), whose sum is σ = 2895897600. Its totient is φ = 1791812880.

The previous prime is 2311122091. The next prime is 2311122127. The reversal of 2311122121 is 1212211132.

It is not a de Polignac number, because 2311122121 - 2⁵ = 2311122089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2311122095 and 2311122104.

It is not an unprimeable number, because it can be changed into a prime (2311122127) 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, 60091 + ... + 90736.

It is an arithmetic number, because the mean of its divisors is an integer number (180993600).

Almost surely, 2^2311122121 is an apocalyptic number.

It is an amenable number.

2311122121 is a deficient number, since it is larger than the sum of its proper divisors (584775479).

2311122121 is a wasteful number, since it uses less digits than its factorization.

2311122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151044.

The product of its digits is 48, while the sum is 16.

The square root of 2311122121 is about 48074.1315158163. The cubic root of 2311122121 is about 1322.1304212770.

Adding to 2311122121 its reverse (1212211132), we get a palindrome (3523333253).

The spelling of 2311122121 in words is "two billion, three hundred eleven million, one hundred twenty-two thousand, one hundred twenty-one".