11312322231 has 48 divisors (see below), whose sum is σ = 18334439424. Its totient is φ = 6174374976.

The previous prime is 11312322221. The next prime is 11312322283. The reversal of 11312322231 is 13222321311.

It is not a de Polignac number, because 11312322231 - 2⁶ = 11312322167 is a prime.

It is a super-2 number, since 2×11312322231² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 11312322198 and 11312322207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11312322221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2915865 + ... + 2919741.

It is an arithmetic number, because the mean of its divisors is an integer number (381967488).

Almost surely, 2^11312322231 is an apocalyptic number.

11312322231 is a deficient number, since it is larger than the sum of its proper divisors (7022117193).

11312322231 is a wasteful number, since it uses less digits than its factorization.

11312322231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4780 (or 4773 counting only the distinct ones).

The product of its digits is 432, while the sum is 21.

Adding to 11312322231 its reverse (13222321311), we get a palindrome (24534643542).

The spelling of 11312322231 in words is "eleven billion, three hundred twelve million, three hundred twenty-two thousand, two hundred thirty-one".