203220321231 has 16 divisors (see below), whose sum is σ = 288659407104. Its totient is φ = 126728509824.

The previous prime is 203220321221. The next prime is 203220321251. The reversal of 203220321231 is 132123022302.

It is a happy number.

It is not a de Polignac number, because 203220321231 - 2¹⁵ = 203220288463 is a prime.

It is a super-2 number, since 2×203220321231² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 203220321198 and 203220321207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203220321211) 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, 12214731 + ... + 12231356.

It is an arithmetic number, because the mean of its divisors is an integer number (18041212944).

Almost surely, 2^203220321231 is an apocalyptic number.

203220321231 is a deficient number, since it is larger than the sum of its proper divisors (85439085873).

203220321231 is a wasteful number, since it uses less digits than its factorization.

203220321231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24446270.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 203220321231 its reverse (132123022302), we get a palindrome (335343343533).

The spelling of 203220321231 in words is "two hundred three billion, two hundred twenty million, three hundred twenty-one thousand, two hundred thirty-one".