2312111121 has 16 divisors (see below), whose sum is σ = 3298271040. Its totient is φ = 1436339520.

The previous prime is 2312111117. The next prime is 2312111141. The reversal of 2312111121 is 1211112132.

It is not a de Polignac number, because 2312111121 - 2² = 2312111117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2312111121.

It is not an unprimeable number, because it can be changed into a prime (2312111141) 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, 329010 + ... + 335963.

It is an arithmetic number, because the mean of its divisors is an integer number (206141940).

Almost surely, 2^2312111121 is an apocalyptic number.

It is an amenable number.

2312111121 is a deficient number, since it is larger than the sum of its proper divisors (986159919).

2312111121 is a wasteful number, since it uses less digits than its factorization.

2312111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665056.

The product of its digits is 24, while the sum is 15.

The square root of 2312111121 is about 48084.4166128695. The cubic root of 2312111121 is about 1322.3189877603.

Adding to 2312111121 its reverse (1211112132), we get a palindrome (3523223253).

The spelling of 2312111121 in words is "two billion, three hundred twelve million, one hundred eleven thousand, one hundred twenty-one".