11311231331 has 8 divisors (see below), whose sum is σ = 11629883328. Its totient is φ = 10994616000.

The previous prime is 11311231301. The next prime is 11311231339. The reversal of 11311231331 is 13313211311.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11311231331 is a prime.

It is a super-2 number, since 2×11311231331² (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 (11311231339) 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, 497900 + ... + 520121.

It is an arithmetic number, because the mean of its divisors is an integer number (1453735416).

Almost surely, 2^11311231331 is an apocalyptic number.

11311231331 is a deficient number, since it is larger than the sum of its proper divisors (318651997).

11311231331 is a wasteful number, since it uses less digits than its factorization.

11311231331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018333.

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

Adding to 11311231331 its reverse (13313211311), we get a palindrome (24624442642).

The spelling of 11311231331 in words is "eleven billion, three hundred eleven million, two hundred thirty-one thousand, three hundred thirty-one".