131024235521 has 2 divisors, whose sum is σ = 131024235522. Its totient is φ = 131024235520.

The previous prime is 131024235491. The next prime is 131024235569. The reversal of 131024235521 is 125532420131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111622810000 + 19401425521 = 334100^2 + 139289^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131024235521 is a prime.

It is not a weakly prime, because it can be changed into another prime (131024235421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65512117760 + 65512117761.

It is an arithmetic number, because the mean of its divisors is an integer number (65512117761).

Almost surely, 2^131024235521 is an apocalyptic number.

It is an amenable number.

131024235521 is a deficient number, since it is larger than the sum of its proper divisors (1).

131024235521 is an equidigital number, since it uses as much as digits as its factorization.

131024235521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 131024235521 its reverse (125532420131), we get a palindrome (256556655652).

The spelling of 131024235521 in words is "one hundred thirty-one billion, twenty-four million, two hundred thirty-five thousand, five hundred twenty-one".