11231312331 has 8 divisors (see below), whose sum is σ = 15022928080. Its totient is φ = 7463619072.

The previous prime is 11231312303. The next prime is 11231312353. The reversal of 11231312331 is 13321313211.

It is a happy number.

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

It is not a de Polignac number, because 11231312331 - 2¹⁹ = 11230788043 is a prime.

It is a super-2 number, since 2×11231312331² (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 = 11231312298 and 11231312307.

It is not an unprimeable number, because it can be changed into a prime (11231312381) 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, 5979526 + ... + 5981403.

It is an arithmetic number, because the mean of its divisors is an integer number (1877866010).

Almost surely, 2^11231312331 is an apocalyptic number.

11231312331 is a deficient number, since it is larger than the sum of its proper divisors (3791615749).

11231312331 is a wasteful number, since it uses less digits than its factorization.

11231312331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11961245.

The product of its digits is 324, while the sum is 21.

Adding to 11231312331 its reverse (13321313211), we get a palindrome (24552625542).

The spelling of 11231312331 in words is "eleven billion, two hundred thirty-one million, three hundred twelve thousand, three hundred thirty-one".