131000310133021 has 4 divisors (see below), whose sum is σ = 149714640152032. Its totient is φ = 112285980114012.

The previous prime is 131000310133009. The next prime is 131000310133031. The reversal of 131000310133021 is 120331013000131.

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 131000310133021 - 2¹⁹ = 131000309608733 is a prime.

It is a super-2 number, since 2×131000310133021² (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 131000310133021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131000310133031) 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, 9357165009495 + ... + 9357165009508.

It is an arithmetic number, because the mean of its divisors is an integer number (37428660038008).

Almost surely, 2^{131000310133021} is an apocalyptic number.

It is an amenable number.

131000310133021 is a deficient number, since it is larger than the sum of its proper divisors (18714330019011).

131000310133021 is an equidigital number, since it uses as much as digits as its factorization.

131000310133021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18714330019010.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 131000310133021 its reverse (120331013000131), we get a palindrome (251331323133152).

The spelling of 131000310133021 in words is "one hundred thirty-one trillion, three hundred ten million, one hundred thirty-three thousand, twenty-one".