202131201231223 has 4 divisors (see below), whose sum is σ = 220506764979528. Its totient is φ = 183755637482920.

The previous prime is 202131201231221. The next prime is 202131201231229. The reversal of 202131201231223 is 322132102131202.

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 202131201231223 - 2¹ = 202131201231221 is a prime.

It is a super-2 number, since 2×202131201231223² (a number of 29 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 (202131201231221) 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, 9187781874136 + ... + 9187781874157.

It is an arithmetic number, because the mean of its divisors is an integer number (55126691244882).

Almost surely, 2^{202131201231223} is an apocalyptic number.

202131201231223 is a deficient number, since it is larger than the sum of its proper divisors (18375563748305).

202131201231223 is a wasteful number, since it uses less digits than its factorization.

202131201231223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18375563748304.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 202131201231223 its reverse (322132102131202), we get a palindrome (524263303362425).

The spelling of 202131201231223 in words is "two hundred two trillion, one hundred thirty-one billion, two hundred one million, two hundred thirty-one thousand, two hundred twenty-three".