111201331 has 2 divisors, whose sum is σ = 111201332. Its totient is φ = 111201330.

The previous prime is 111201323. The next prime is 111201359. The reversal of 111201331 is 133102111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111201331 - 2³ = 111201323 is a prime.

It is a super-2 number, since 2×111201331² = 24731472032343122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111201361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55600665 + 55600666.

It is an arithmetic number, because the mean of its divisors is an integer number (55600666).

Almost surely, 2^111201331 is an apocalyptic number.

111201331 is a deficient number, since it is larger than the sum of its proper divisors (1).

111201331 is an equidigital number, since it uses as much as digits as its factorization.

111201331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 111201331 is about 10545.2041706171. The cubic root of 111201331 is about 480.8799411629.

Adding to 111201331 its reverse (133102111), we get a palindrome (244303442).

The spelling of 111201331 in words is "one hundred eleven million, two hundred one thousand, three hundred thirty-one".