201111112033231 has 4 divisors (see below), whose sum is σ = 201111315157432. Its totient is φ = 201110908909032.

The previous prime is 201111112033177. The next prime is 201111112033241. The reversal of 201111112033231 is 132330211111102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201111112033231 is a prime.

It is a super-2 number, since 2×201111112033231² (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 (201111112033241) 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, 100069656 + ... + 102059581.

It is an arithmetic number, because the mean of its divisors is an integer number (50277828789358).

Almost surely, 2^{201111112033231} is an apocalyptic number.

201111112033231 is a deficient number, since it is larger than the sum of its proper divisors (203124201).

201111112033231 is an equidigital number, since it uses as much as digits as its factorization.

201111112033231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203124200.

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

Adding to 201111112033231 its reverse (132330211111102), we get a palindrome (333441323144333).

The spelling of 201111112033231 in words is "two hundred one trillion, one hundred eleven billion, one hundred twelve million, thirty-three thousand, two hundred thirty-one".