201123103111231 has 6 divisors (see below), whose sum is σ = 233959528109040. Its totient is φ = 172391231238156.

The previous prime is 201123103111219. The next prime is 201123103111277. The reversal of 201123103111231 is 132111301321102.

It is not a de Polignac number, because 201123103111231 - 2¹⁹ = 201123102586943 is a prime.

It is a super-2 number, since 2×201123103111231² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201123103111031) 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, 2052276562311 + ... + 2052276562408.

It is an arithmetic number, because the mean of its divisors is an integer number (38993254684840).

Almost surely, 2^{201123103111231} is an apocalyptic number.

201123103111231 is a deficient number, since it is larger than the sum of its proper divisors (32836424997809).

201123103111231 is an equidigital number, since it uses as much as digits as its factorization.

201123103111231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4104553124733 (or 4104553124726 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 201123103111231 its reverse (132111301321102), we get a palindrome (333234404432333).

The spelling of 201123103111231 in words is "two hundred one trillion, one hundred twenty-three billion, one hundred three million, one hundred eleven thousand, two hundred thirty-one".