131332021 has 8 divisors (see below), whose sum is σ = 139273344. Its totient is φ = 123414720.

The previous prime is 131331997. The next prime is 131332031. The reversal of 131332021 is 120233131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131332021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131331986 and 131332004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131332031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5956 + ... + 17266.

It is an arithmetic number, because the mean of its divisors is an integer number (17409168).

Almost surely, 2^131332021 is an apocalyptic number.

It is an amenable number.

131332021 is a deficient number, since it is larger than the sum of its proper divisors (7941323).

131332021 is a wasteful number, since it uses less digits than its factorization.

131332021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12011.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 131332021 is about 11460.0183682226. The cubic root of 131332021 is about 508.3040177546.

Adding to 131332021 its reverse (120233131), we get a palindrome (251565152).

The spelling of 131332021 in words is "one hundred thirty-one million, three hundred thirty-two thousand, twenty-one".