201312111 has 64 divisors (see below), whose sum is σ = 369008640. Its totient is φ = 94227840.

The previous prime is 201312107. The next prime is 201312119. The reversal of 201312111 is 111213102.

It is not a de Polignac number, because 201312111 - 2² = 201312107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201312119) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 128350 + ... + 129908.

It is an arithmetic number, because the mean of its divisors is an integer number (5765760).

Almost surely, 2^201312111 is an apocalyptic number.

201312111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

201312111 is a deficient number, since it is larger than the sum of its proper divisors (167696529).

201312111 is a wasteful number, since it uses less digits than its factorization.

201312111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1636.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 201312111 is about 14188.4499153361. The cubic root of 201312111 is about 586.0796396866.

Adding to 201312111 its reverse (111213102), we get a palindrome (312525213).

Subtracting from 201312111 its reverse (111213102), we obtain a palindrome (90099009).

It can be divided in two parts, 20 and 1312111, that added together give a palindrome (1312131).

The spelling of 201312111 in words is "two hundred one million, three hundred twelve thousand, one hundred eleven".