201231022231 has 4 divisors (see below), whose sum is σ = 204234470392. Its totient is φ = 198227574072.

The previous prime is 201231022193. The next prime is 201231022241. The reversal of 201231022231 is 132220132102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132220132102 = 2 ⋅66110066051.

It is a cyclic number.

It is not a de Polignac number, because 201231022231 - 2¹⁷ = 201230891159 is a prime.

It is a super-2 number, since 2×201231022231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201231022199 and 201231022208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201231022241) 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, 1501723980 + ... + 1501724113.

It is an arithmetic number, because the mean of its divisors is an integer number (51058617598).

Almost surely, 2^201231022231 is an apocalyptic number.

201231022231 is a deficient number, since it is larger than the sum of its proper divisors (3003448161).

201231022231 is an equidigital number, since it uses as much as digits as its factorization.

201231022231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3003448160.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 201231022231 its reverse (132220132102), we get a palindrome (333451154333).

The spelling of 201231022231 in words is "two hundred one billion, two hundred thirty-one million, twenty-two thousand, two hundred thirty-one".