131033331521 has 2 divisors, whose sum is σ = 131033331522. Its totient is φ = 131033331520.

The previous prime is 131033331469. The next prime is 131033331529. The reversal of 131033331521 is 125133330131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67579721521 + 63453610000 = 259961^2 + 251900^2 .

It is a cyclic number.

It is not a de Polignac number, because 131033331521 - 2¹⁴ = 131033315137 is a prime.

It is not a weakly prime, because it can be changed into another prime (131033331529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65516665760 + 65516665761.

It is an arithmetic number, because the mean of its divisors is an integer number (65516665761).

Almost surely, 2^131033331521 is an apocalyptic number.

It is an amenable number.

131033331521 is a deficient number, since it is larger than the sum of its proper divisors (1).

131033331521 is an equidigital number, since it uses as much as digits as its factorization.

131033331521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 26.

Adding to 131033331521 its reverse (125133330131), we get a palindrome (256166661652).

The spelling of 131033331521 in words is "one hundred thirty-one billion, thirty-three million, three hundred thirty-one thousand, five hundred twenty-one".