11311312331 has 8 divisors (see below), whose sum is σ = 12408552000. Its totient is φ = 10225562440.

The previous prime is 11311312307. The next prime is 11311312343. The reversal of 11311312331 is 13321311311.

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 11311312331 - 2⁶ = 11311312267 is a prime.

It is a super-2 number, since 2×11311312331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11311312391) 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, 2870381 + ... + 2874318.

It is an arithmetic number, because the mean of its divisors is an integer number (1551069000).

Almost surely, 2^11311312331 is an apocalyptic number.

11311312331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11311312331 is a deficient number, since it is larger than the sum of its proper divisors (1097239669).

11311312331 is a wasteful number, since it uses less digits than its factorization.

11311312331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5744889.

The product of its digits is 162, while the sum is 20.

Adding to 11311312331 its reverse (13321311311), we get a palindrome (24632623642).

The spelling of 11311312331 in words is "eleven billion, three hundred eleven million, three hundred twelve thousand, three hundred thirty-one".