202120320131 has 4 divisors (see below), whose sum is σ = 205433768064. Its totient is φ = 198806872200.

The previous prime is 202120320079. The next prime is 202120320163. The reversal of 202120320131 is 131023021202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 202120320131 - 2³⁰ = 201046578307 is a prime.

It is a super-2 number, since 2×202120320131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202120340131) 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, 1656723875 + ... + 1656723996.

It is an arithmetic number, because the mean of its divisors is an integer number (51358442016).

Almost surely, 2^202120320131 is an apocalyptic number.

202120320131 is a deficient number, since it is larger than the sum of its proper divisors (3313447933).

202120320131 is an equidigital number, since it uses as much as digits as its factorization.

202120320131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3313447932.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 202120320131 its reverse (131023021202), we get a palindrome (333143341333).

The spelling of 202120320131 in words is "two hundred two billion, one hundred twenty million, three hundred twenty thousand, one hundred thirty-one".