11312131402 has 32 divisors (see below), whose sum is σ = 19951505280. Its totient is φ = 4742339520.

The previous prime is 11312131399. The next prime is 11312131421. The reversal of 11312131402 is 20413121311.

It is a super-2 number, since 2×11312131402² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11312131402.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 335403 + ... + 367585.

It is an arithmetic number, because the mean of its divisors is an integer number (623484540).

Almost surely, 2^11312131402 is an apocalyptic number.

11312131402 is a deficient number, since it is larger than the sum of its proper divisors (8639373878).

11312131402 is a wasteful number, since it uses less digits than its factorization.

11312131402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33438.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 11312131402 its reverse (20413121311), we get a palindrome (31725252713).

The spelling of 11312131402 in words is "eleven billion, three hundred twelve million, one hundred thirty-one thousand, four hundred two".