11123312331 has 32 divisors (see below), whose sum is σ = 15420041280. Its totient is φ = 7126327296.

The previous prime is 11123312327. The next prime is 11123312359. The reversal of 11123312331 is 13321332111.

It is a happy number.

It is not a de Polignac number, because 11123312331 - 2² = 11123312327 is a prime.

It is a super-2 number, since 2×11123312331² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11123312298 and 11123312307.

It is not an unprimeable number, because it can be changed into a prime (11123312131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8709865 + ... + 8711141.

It is an arithmetic number, because the mean of its divisors is an integer number (481876290).

Almost surely, 2^11123312331 is an apocalyptic number.

11123312331 is a deficient number, since it is larger than the sum of its proper divisors (4296728949).

11123312331 is a wasteful number, since it uses less digits than its factorization.

11123312331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2223.

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

Adding to 11123312331 its reverse (13321332111), we get a palindrome (24444644442).

The spelling of 11123312331 in words is "eleven billion, one hundred twenty-three million, three hundred twelve thousand, three hundred thirty-one".