12118705531 has 2 divisors, whose sum is σ = 12118705532. Its totient is φ = 12118705530.

The previous prime is 12118705507. The next prime is 12118705537. The reversal of 12118705531 is 13550781121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12118705531 - 2⁹ = 12118705019 is a prime.

It is a super-2 number, since 2×12118705531² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12118705537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6059352765 + 6059352766.

It is an arithmetic number, because the mean of its divisors is an integer number (6059352766).

Almost surely, 2^12118705531 is an apocalyptic number.

12118705531 is a deficient number, since it is larger than the sum of its proper divisors (1).

12118705531 is an equidigital number, since it uses as much as digits as its factorization.

12118705531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 34.

The spelling of 12118705531 in words is "twelve billion, one hundred eighteen million, seven hundred five thousand, five hundred thirty-one".