202131223112131 has 4 divisors (see below), whose sum is σ = 202860938719312. Its totient is φ = 201401507504952.

The previous prime is 202131223112101. The next prime is 202131223112153. The reversal of 202131223112131 is 131211322131202.

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 202131223112131 - 2¹¹ = 202131223110083 is a prime.

It is a super-2 number, since 2×202131223112131² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202131223112096 and 202131223112105.

It is not an unprimeable number, because it can be changed into a prime (202131223112101) 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, 364857803175 + ... + 364857803728.

It is an arithmetic number, because the mean of its divisors is an integer number (50715234679828).

Almost surely, 2^{202131223112131} is an apocalyptic number.

202131223112131 is a deficient number, since it is larger than the sum of its proper divisors (729715607181).

202131223112131 is an equidigital number, since it uses as much as digits as its factorization.

202131223112131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729715607180.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 202131223112131 its reverse (131211322131202), we get a palindrome (333342545243333).

The spelling of 202131223112131 in words is "two hundred two trillion, one hundred thirty-one billion, two hundred twenty-three million, one hundred twelve thousand, one hundred thirty-one".