131024515021 has 16 divisors (see below), whose sum is σ = 138992951808. Its totient is φ = 123085324800.

The previous prime is 131024515019. The next prime is 131024515031. The reversal of 131024515021 is 120515420131.

It is a cyclic number.

It is not a de Polignac number, because 131024515021 - 2¹ = 131024515019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131024515031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29501161 + ... + 29505601.

It is an arithmetic number, because the mean of its divisors is an integer number (8687059488).

Almost surely, 2^131024515021 is an apocalyptic number.

It is an amenable number.

131024515021 is a deficient number, since it is larger than the sum of its proper divisors (7968436787).

131024515021 is a wasteful number, since it uses less digits than its factorization.

131024515021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7332.

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 131024515021 its reverse (120515420131), we get a palindrome (251539935152).

The spelling of 131024515021 in words is "one hundred thirty-one billion, twenty-four million, five hundred fifteen thousand, twenty-one".