202113231131 has 6 divisors (see below), whose sum is σ = 235111309740. Its totient is φ = 173239912356.

The previous prime is 202113231107. The next prime is 202113231137. The reversal of 202113231131 is 131132311202.

It is a happy number.

It is not a de Polignac number, because 202113231131 - 2²² = 202109036827 is a prime.

It is a super-2 number, since 2×202113231131² (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 (202113231137) 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, 2062379861 + ... + 2062379958.

It is an arithmetic number, because the mean of its divisors is an integer number (39185218290).

Almost surely, 2^202113231131 is an apocalyptic number.

202113231131 is a deficient number, since it is larger than the sum of its proper divisors (32998078609).

202113231131 is an equidigital number, since it uses as much as digits as its factorization.

202113231131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4124759833 (or 4124759826 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 202113231131 its reverse (131132311202), we get a palindrome (333245542333).

The spelling of 202113231131 in words is "two hundred two billion, one hundred thirteen million, two hundred thirty-one thousand, one hundred thirty-one".