203231220131 has 16 divisors (see below), whose sum is σ = 207952780704. Its totient is φ = 198561901824.

The previous prime is 203231220113. The next prime is 203231220193. The reversal of 203231220131 is 131022132302.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203231220131 is a prime.

It is a super-2 number, since 2×203231220131² (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 (203231223131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11125001 + ... + 11143253.

It is an arithmetic number, because the mean of its divisors is an integer number (12997048794).

Almost surely, 2^203231220131 is an apocalyptic number.

203231220131 is a deficient number, since it is larger than the sum of its proper divisors (4721560573).

203231220131 is a wasteful number, since it uses less digits than its factorization.

203231220131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19670.

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

Adding to 203231220131 its reverse (131022132302), we get a palindrome (334253352433).

The spelling of 203231220131 in words is "two hundred three billion, two hundred thirty-one million, two hundred twenty thousand, one hundred thirty-one".