2312111021331 has 16 divisors (see below), whose sum is σ = 3166590692000. Its totient is φ = 1499531367168.

The previous prime is 2312111021321. The next prime is 2312111021351. The reversal of 2312111021331 is 1331201112132.

It is not a de Polignac number, because 2312111021331 - 2¹³ = 2312111013139 is a prime.

It is a super-2 number, since 2×2312111021331² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2312111021298 and 2312111021307.

It is not an unprimeable number, because it can be changed into a prime (2312111021321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 727426 + ... + 2270103.

It is an arithmetic number, because the mean of its divisors is an integer number (197911918250).

Almost surely, 2^{2312111021331} is an apocalyptic number.

2312111021331 is a deficient number, since it is larger than the sum of its proper divisors (854479670669).

2312111021331 is a wasteful number, since it uses less digits than its factorization.

2312111021331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3004518.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 2312111021331 its reverse (1331201112132), we get a palindrome (3643312133463).

The spelling of 2312111021331 in words is "two trillion, three hundred twelve billion, one hundred eleven million, twenty-one thousand, three hundred thirty-one".