2311111312 has 10 divisors (see below), whose sum is σ = 4477778198. Its totient is φ = 1155555648.

The previous prime is 2311111259. The next prime is 2311111321. The reversal of 2311111312 is 2131111132.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1789628416 + 521482896 = 42304^2 + 22836^2 .

It is a super-2 number, since 2×2311111312² = 10682470992908722688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16), and also a Moran number because the ratio is a prime number: 144444457 = 2311111312 / (2 + 3 + 1 + 1 + 1 + 1 + 1 + 3 + 1 + 2).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72222213 + ... + 72222244.

Almost surely, 2^2311111312 is an apocalyptic number.

It is an amenable number.

2311111312 is a deficient number, since it is larger than the sum of its proper divisors (2166666886).

2311111312 is a wasteful number, since it uses less digits than its factorization.

2311111312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144444465 (or 144444459 counting only the distinct ones).

The product of its digits is 36, while the sum is 16.

The square root of 2311111312 is about 48074.0190955572. The cubic root of 2311111312 is about 1322.1283600950.

Adding to 2311111312 its reverse (2131111132), we get a palindrome (4442222444).

The spelling of 2311111312 in words is "two billion, three hundred eleven million, one hundred eleven thousand, three hundred twelve".