11999272031 has 2 divisors, whose sum is σ = 11999272032. Its totient is φ = 11999272030.

The previous prime is 11999271961. The next prime is 11999272057. The reversal of 11999272031 is 13027299911.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11999272031 is a prime.

It is a super-2 number, since 2×11999272031² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11999272081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5999636015 + 5999636016.

It is an arithmetic number, because the mean of its divisors is an integer number (5999636016).

Almost surely, 2^11999272031 is an apocalyptic number.

11999272031 is a deficient number, since it is larger than the sum of its proper divisors (1).

11999272031 is an equidigital number, since it uses as much as digits as its factorization.

11999272031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 44.

The spelling of 11999272031 in words is "eleven billion, nine hundred ninety-nine million, two hundred seventy-two thousand, thirty-one".