12431300111261 has 2 divisors, whose sum is σ = 12431300111262. Its totient is φ = 12431300111260.

The previous prime is 12431300111221. The next prime is 12431300111323. The reversal of 12431300111261 is 16211100313421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9762344025625 + 2668956085636 = 3124475^2 + 1633694^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12431300111261 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12431300111261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12431300111221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6215650055630 + 6215650055631.

It is an arithmetic number, because the mean of its divisors is an integer number (6215650055631).

Almost surely, 2^{12431300111261} is an apocalyptic number.

It is an amenable number.

12431300111261 is a deficient number, since it is larger than the sum of its proper divisors (1).

12431300111261 is an equidigital number, since it uses as much as digits as its factorization.

12431300111261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

Adding to 12431300111261 its reverse (16211100313421), we get a palindrome (28642400424682).

The spelling of 12431300111261 in words is "twelve trillion, four hundred thirty-one billion, three hundred million, one hundred eleven thousand, two hundred sixty-one".