11312011331 has 4 divisors (see below), whose sum is σ = 11330647872. Its totient is φ = 11293374792.

The previous prime is 11312011283. The next prime is 11312011351. The reversal of 11312011331 is 13311021311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11312011331 - 2³⁰ = 10238269507 is a prime.

It is a super-3 number, since 3×11312011331³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11312011351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9317360 + ... + 9318573.

It is an arithmetic number, because the mean of its divisors is an integer number (2832661968).

Almost surely, 2^11312011331 is an apocalyptic number.

11312011331 is a deficient number, since it is larger than the sum of its proper divisors (18636541).

11312011331 is an equidigital number, since it uses as much as digits as its factorization.

11312011331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18636540.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 11312011331 its reverse (13311021311), we get a palindrome (24623032642).

The spelling of 11312011331 in words is "eleven billion, three hundred twelve million, eleven thousand, three hundred thirty-one".