131121320102021 has 4 divisors (see below), whose sum is σ = 135351040105344. Its totient is φ = 126891600098700.

The previous prime is 131121320101969. The next prime is 131121320102033. The reversal of 131121320102021 is 120201023121131.

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 131121320102021 - 2⁴² = 126723273590917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131121320101984 and 131121320102002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131121320102051) 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, 2114860001615 + ... + 2114860001676.

It is an arithmetic number, because the mean of its divisors is an integer number (33837760026336).

Almost surely, 2^{131121320102021} is an apocalyptic number.

It is an amenable number.

131121320102021 is a deficient number, since it is larger than the sum of its proper divisors (4229720003323).

131121320102021 is an equidigital number, since it uses as much as digits as its factorization.

131121320102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4229720003322.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 131121320102021 its reverse (120201023121131), we get a palindrome (251322343223152).

The spelling of 131121320102021 in words is "one hundred thirty-one trillion, one hundred twenty-one billion, three hundred twenty million, one hundred two thousand, twenty-one".