111213201 has 16 divisors (see below), whose sum is σ = 171281088. Its totient is φ = 63436800.

The previous prime is 111213191. The next prime is 111213203. The reversal of 111213201 is 102312111.

It is not a de Polignac number, because 111213201 - 2⁵ = 111213169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111213203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98560 + ... + 99681.

It is an arithmetic number, because the mean of its divisors is an integer number (10705068).

Almost surely, 2^111213201 is an apocalyptic number.

111213201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111213201 is a deficient number, since it is larger than the sum of its proper divisors (60067887).

111213201 is a wasteful number, since it uses less digits than its factorization.

111213201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198272.

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

The square root of 111213201 is about 10545.7669706854. The cubic root of 111213201 is about 480.8970507957.

Adding to 111213201 its reverse (102312111), we get a palindrome (213525312).

It can be divided in two parts, 111 and 213201, that added together give a palindrome (213312).

The spelling of 111213201 in words is "one hundred eleven million, two hundred thirteen thousand, two hundred one".