202112321231 has 4 divisors (see below), whose sum is σ = 202144101264. Its totient is φ = 202080541200.

The previous prime is 202112321209. The next prime is 202112321249. The reversal of 202112321231 is 132123211202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202112321231 is a prime.

It is a super-2 number, since 2×202112321231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202112321291) 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, 15880475 + ... + 15893196.

It is an arithmetic number, because the mean of its divisors is an integer number (50536025316).

Almost surely, 2^202112321231 is an apocalyptic number.

202112321231 is a deficient number, since it is larger than the sum of its proper divisors (31780033).

202112321231 is an equidigital number, since it uses as much as digits as its factorization.

202112321231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31780032.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 202112321231 its reverse (132123211202), we get a palindrome (334235532433).

The spelling of 202112321231 in words is "two hundred two billion, one hundred twelve million, three hundred twenty-one thousand, two hundred thirty-one".