131000322021 has 4 divisors (see below), whose sum is σ = 174667096032. Its totient is φ = 87333548012.

The previous prime is 131000321999. The next prime is 131000322023. The reversal of 131000322021 is 120223000131.

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 131000322021 - 2⁵ = 131000321989 is a prime.

It is a super-2 number, since 2×131000322021² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131000322023) 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, 21833387001 + ... + 21833387006.

It is an arithmetic number, because the mean of its divisors is an integer number (43666774008).

Almost surely, 2^131000322021 is an apocalyptic number.

It is an amenable number.

131000322021 is a deficient number, since it is larger than the sum of its proper divisors (43666774011).

131000322021 is an equidigital number, since it uses as much as digits as its factorization.

131000322021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43666774010.

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

Adding to 131000322021 its reverse (120223000131), we get a palindrome (251223322152).

The spelling of 131000322021 in words is "one hundred thirty-one billion, three hundred twenty-two thousand, twenty-one".