201023311231 has 6 divisors (see below), whose sum is σ = 206045906096. Its totient is φ = 196120302000.

The previous prime is 201023311213. The next prime is 201023311297. The reversal of 201023311231 is 132113320102.

It is not a de Polignac number, because 201023311231 - 2¹¹ = 201023309183 is a prime.

It is a super-2 number, since 2×201023311231² (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 = 201023311199 and 201023311208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201023311211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 59791095 + ... + 59794456.

Almost surely, 2^201023311231 is an apocalyptic number.

201023311231 is a deficient number, since it is larger than the sum of its proper divisors (5022594865).

201023311231 is an equidigital number, since it uses as much as digits as its factorization.

201023311231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119585633 (or 119585592 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 201023311231 its reverse (132113320102), we get a palindrome (333136631333).

It can be divided in two parts, 20102 and 3311231, that added together give a palindrome (3331333).

The spelling of 201023311231 in words is "two hundred one billion, twenty-three million, three hundred eleven thousand, two hundred thirty-one".