131000321023021 has 6 divisors (see below), whose sum is σ = 133258298407022. Its totient is φ = 128779976595480.

The previous prime is 131000321022971. The next prime is 131000321023031. The reversal of 131000321023021 is 120320123000131.

It can be written as a sum of positive squares in only one way, i.e., 111633192366921 + 19367128656100 = 10565661^2 + 4400810^2 .

It is not a de Polignac number, because 131000321023021 - 2²¹ = 131000318925869 is a prime.

It is a super-2 number, since 2×131000321023021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131000321023021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131000321023031) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18816474690 + ... + 18816481651.

Almost surely, 2^{131000321023021} is an apocalyptic number.

It is an amenable number.

131000321023021 is a deficient number, since it is larger than the sum of its proper divisors (2257977384001).

131000321023021 is an frugal number, since it uses more digits than its factorization.

131000321023021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37632956459 (or 37632956400 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 131000321023021 its reverse (120320123000131), we get a palindrome (251320444023152).

The spelling of 131000321023021 in words is "one hundred thirty-one trillion, three hundred twenty-one million, twenty-three thousand, twenty-one".