11131222312 has 16 divisors (see below), whose sum is σ = 23852619360. Its totient is φ = 4770523824.

The previous prime is 11131222273. The next prime is 11131222327. The reversal of 11131222312 is 21322213111.

It is a super-2 number, since 2×11131222312² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11131222312.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99385858 + ... + 99385969.

It is an arithmetic number, because the mean of its divisors is an integer number (1490788710).

Almost surely, 2^11131222312 is an apocalyptic number.

It is an amenable number.

11131222312 is an abundant number, since it is smaller than the sum of its proper divisors (12721397048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11131222312 is a wasteful number, since it uses less digits than its factorization.

11131222312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198771840 (or 198771836 counting only the distinct ones).

The product of its digits is 144, while the sum is 19.

Adding to 11131222312 its reverse (21322213111), we get a palindrome (32453435423).

The spelling of 11131222312 in words is "eleven billion, one hundred thirty-one million, two hundred twenty-two thousand, three hundred twelve".