131021024213 has 4 divisors (see below), whose sum is σ = 131060718828. Its totient is φ = 130981329600.

The previous prime is 131021024161. The next prime is 131021024221. The reversal of 131021024213 is 312420120131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35758053604 + 95262970609 = 189098^2 + 308647^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131021024213 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 (131021024413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19842356 + ... + 19848957.

It is an arithmetic number, because the mean of its divisors is an integer number (32765179707).

Almost surely, 2^131021024213 is an apocalyptic number.

It is an amenable number.

131021024213 is a deficient number, since it is larger than the sum of its proper divisors (39694615).

131021024213 is an equidigital number, since it uses as much as digits as its factorization.

131021024213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39694614.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 131021024213 its reverse (312420120131), we get a palindrome (443441144344).

The spelling of 131021024213 in words is "one hundred thirty-one billion, twenty-one million, twenty-four thousand, two hundred thirteen".