131322021 has 8 divisors (see below), whose sum is σ = 175496640. Its totient is φ = 87347712.

The previous prime is 131322017. The next prime is 131322047. The reversal of 131322021 is 120223131.

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

It is not a de Polignac number, because 131322021 - 2² = 131322017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131322421) 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, 48540 + ... + 51173.

It is an arithmetic number, because the mean of its divisors is an integer number (21937080).

Almost surely, 2^131322021 is an apocalyptic number.

It is an amenable number.

131322021 is a deficient number, since it is larger than the sum of its proper divisors (44174619).

131322021 is an equidigital number, since it uses as much as digits as its factorization.

131322021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100155.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 131322021 is about 11459.5820604418. The cubic root of 131322021 is about 508.2911161810.

Adding to 131322021 its reverse (120223131), we get a palindrome (251545152).

The spelling of 131322021 in words is "one hundred thirty-one million, three hundred twenty-two thousand, twenty-one".