11011312431 has 12 divisors (see below), whose sum is σ = 18177404752. Its totient is φ = 6292178496.

The previous prime is 11011312427. The next prime is 11011312447. The reversal of 11011312431 is 13421311011.

It is a happy number.

11011312431 is a `hidden beast` number, since 1 + 101 + 131 + 2 + 431 = 666.

It is not a de Polignac number, because 11011312431 - 2² = 11011312427 is a prime.

It is a super-2 number, since 2×11011312431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011312531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87391306 + ... + 87391431.

Almost surely, 2^11011312431 is an apocalyptic number.

11011312431 is a deficient number, since it is larger than the sum of its proper divisors (7166092321).

11011312431 is a wasteful number, since it uses less digits than its factorization.

11011312431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174782750 (or 174782747 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 11011312431 its reverse (13421311011), we get a palindrome (24432623442).

The spelling of 11011312431 in words is "eleven billion, eleven million, three hundred twelve thousand, four hundred thirty-one".