12049531231 has 2 divisors, whose sum is σ = 12049531232. Its totient is φ = 12049531230.

The previous prime is 12049531229. The next prime is 12049531261. The reversal of 12049531231 is 13213594021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12049531231 - 2¹ = 12049531229 is a prime.

It is a super-2 number, since 2×12049531231² (a number of 21 digits) contains 22 as substring.

Together with 12049531229, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 12049531193 and 12049531202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12049531261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6024765615 + 6024765616.

It is an arithmetic number, because the mean of its divisors is an integer number (6024765616).

Almost surely, 2^12049531231 is an apocalyptic number.

12049531231 is a deficient number, since it is larger than the sum of its proper divisors (1).

12049531231 is an equidigital number, since it uses as much as digits as its factorization.

12049531231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The spelling of 12049531231 in words is "twelve billion, forty-nine million, five hundred thirty-one thousand, two hundred thirty-one".