12206561531 has 2 divisors, whose sum is σ = 12206561532. Its totient is φ = 12206561530.

The previous prime is 12206561513. The next prime is 12206561537. The reversal of 12206561531 is 13516560221.

Together with previous prime (12206561513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12206561531 is a prime.

It is a super-2 number, since 2×12206561531² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12206561537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6103280765 + 6103280766.

It is an arithmetic number, because the mean of its divisors is an integer number (6103280766).

Almost surely, 2^12206561531 is an apocalyptic number.

12206561531 is a deficient number, since it is larger than the sum of its proper divisors (1).

12206561531 is an equidigital number, since it uses as much as digits as its factorization.

12206561531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 32.

The spelling of 12206561531 in words is "twelve billion, two hundred six million, five hundred sixty-one thousand, five hundred thirty-one".