201223101231 has 32 divisors (see below), whose sum is σ = 299043176640. Its totient is φ = 133728537600.

The previous prime is 201223101229. The next prime is 201223101253. The reversal of 201223101231 is 132101322102.

201223101231 is a `hidden beast` number, since 2 + 0 + 122 + 310 + 1 + 231 = 666.

It is not a de Polignac number, because 201223101231 - 2¹ = 201223101229 is a prime.

It is a super-2 number, since 2×201223101231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201223101931) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16828551 + ... + 16840503.

It is an arithmetic number, because the mean of its divisors is an integer number (9345099270).

Almost surely, 2^201223101231 is an apocalyptic number.

201223101231 is a deficient number, since it is larger than the sum of its proper divisors (97820075409).

201223101231 is a wasteful number, since it uses less digits than its factorization.

201223101231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13864 (or 13858 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 201223101231 its reverse (132101322102), we get a palindrome (333324423333).

The spelling of 201223101231 in words is "two hundred one billion, two hundred twenty-three million, one hundred one thousand, two hundred thirty-one".