11612222731 has 4 divisors (see below), whose sum is σ = 11630983000. Its totient is φ = 11593462464.

The previous prime is 11612222683. The next prime is 11612222737. The reversal of 11612222731 is 13722221611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11612222731 - 2²⁷ = 11478005003 is a prime.

It is a super-2 number, since 2×11612222731² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11612222731.

It is not an unprimeable number, because it can be changed into a prime (11612222737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9379206 + ... + 9380443.

It is an arithmetic number, because the mean of its divisors is an integer number (2907745750).

Almost surely, 2^11612222731 is an apocalyptic number.

11612222731 is a deficient number, since it is larger than the sum of its proper divisors (18760269).

11612222731 is an equidigital number, since it uses as much as digits as its factorization.

11612222731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18760268.

The product of its digits is 2016, while the sum is 28.

The spelling of 11612222731 in words is "eleven billion, six hundred twelve million, two hundred twenty-two thousand, seven hundred thirty-one".