131033578021 has 4 divisors (see below), whose sum is σ = 131300449344. Its totient is φ = 130766706700.

The previous prime is 131033577967. The next prime is 131033578057. The reversal of 131033578021 is 120875330131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131033578021 - 2¹¹ = 131033575973 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 (131033548021) 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, 133434925 + ... + 133435906.

It is an arithmetic number, because the mean of its divisors is an integer number (32825112336).

Almost surely, 2^131033578021 is an apocalyptic number.

It is an amenable number.

131033578021 is a deficient number, since it is larger than the sum of its proper divisors (266871323).

131033578021 is an equidigital number, since it uses as much as digits as its factorization.

131033578021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266871322.

The product of its (nonzero) digits is 15120, while the sum is 34.

The spelling of 131033578021 in words is "one hundred thirty-one billion, thirty-three million, five hundred seventy-eight thousand, twenty-one".