11312212031 has 8 divisors (see below), whose sum is σ = 11374691328. Its totient is φ = 11249767000.

The previous prime is 11312212027. The next prime is 11312212069. The reversal of 11312212031 is 13021221311.

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

It is a cyclic number.

It is not a de Polignac number, because 11312212031 - 2² = 11312212027 is a prime.

It is a super-2 number, since 2×11312212031² (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 (11312232031) 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, 935816 + ... + 947826.

It is an arithmetic number, because the mean of its divisors is an integer number (1421836416).

Almost surely, 2^11312212031 is an apocalyptic number.

11312212031 is a deficient number, since it is larger than the sum of its proper divisors (62479297).

11312212031 is a wasteful number, since it uses less digits than its factorization.

11312212031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17133.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 11312212031 its reverse (13021221311), we get a palindrome (24333433342).

The spelling of 11312212031 in words is "eleven billion, three hundred twelve million, two hundred twelve thousand, thirty-one".