11312203231 has 8 divisors (see below), whose sum is σ = 12974242464. Its totient is φ = 9661666560.

The previous prime is 11312203213. The next prime is 11312203247. The reversal of 11312203231 is 13230221311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11312203231 - 2³¹ = 9164719583 is a prime.

It is a super-2 number, since 2×11312203231² (a number of 21 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 = 11312203199 and 11312203208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11312203271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2873530 + ... + 2877463.

It is an arithmetic number, because the mean of its divisors is an integer number (1621780308).

Almost surely, 2^11312203231 is an apocalyptic number.

11312203231 is a deficient number, since it is larger than the sum of its proper divisors (1662039233).

11312203231 is an equidigital number, since it uses as much as digits as its factorization.

11312203231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5751281.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 11312203231 its reverse (13230221311), we get a palindrome (24542424542).

The spelling of 11312203231 in words is "eleven billion, three hundred twelve million, two hundred three thousand, two hundred thirty-one".