203122013231 has 4 divisors (see below), whose sum is σ = 203124483600. Its totient is φ = 203119542864.

The previous prime is 203122013219. The next prime is 203122013273. The reversal of 203122013231 is 132310221302.

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 203122013231 - 2²² = 203117818927 is a prime.

It is a super-2 number, since 2×203122013231² (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 (203122013431) 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, 1107446 + ... + 1277763.

It is an arithmetic number, because the mean of its divisors is an integer number (50781120900).

Almost surely, 2^203122013231 is an apocalyptic number.

203122013231 is a deficient number, since it is larger than the sum of its proper divisors (2470369).

203122013231 is an equidigital number, since it uses as much as digits as its factorization.

203122013231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2470368.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 203122013231 its reverse (132310221302), we get a palindrome (335432234533).

The spelling of 203122013231 in words is "two hundred three billion, one hundred twenty-two million, thirteen thousand, two hundred thirty-one".