11112971231 has 2 divisors, whose sum is σ = 11112971232. Its totient is φ = 11112971230.

The previous prime is 11112971227. The next prime is 11112971251. The reversal of 11112971231 is 13217921111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11112971231 - 2² = 11112971227 is a prime.

It is a super-2 number, since 2×11112971231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11112971194 and 11112971203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11112971251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5556485615 + 5556485616.

It is an arithmetic number, because the mean of its divisors is an integer number (5556485616).

Almost surely, 2^11112971231 is an apocalyptic number.

11112971231 is a deficient number, since it is larger than the sum of its proper divisors (1).

11112971231 is an equidigital number, since it uses as much as digits as its factorization.

11112971231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756, while the sum is 29.

The spelling of 11112971231 in words is "eleven billion, one hundred twelve million, nine hundred seventy-one thousand, two hundred thirty-one".