111452221 has 4 divisors (see below), whose sum is σ = 118008252. Its totient is φ = 104896192.

The previous prime is 111452203. The next prime is 111452261. The reversal of 111452221 is 122254111.

111452221 = 1794² + 1795² + ... + 1827².

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

It can be written as a sum of positive squares in 2 ways, for example, as 97239321 + 14212900 = 9861^2 + 3770^2 .

It is a cyclic number.

It is not a de Polignac number, because 111452221 - 2⁵ = 111452189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111452261) 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, 3277990 + ... + 3278023.

It is an arithmetic number, because the mean of its divisors is an integer number (29502063).

Almost surely, 2^111452221 is an apocalyptic number.

It is an amenable number.

111452221 is a deficient number, since it is larger than the sum of its proper divisors (6556031).

111452221 is an equidigital number, since it uses as much as digits as its factorization.

111452221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6556030.

The product of its digits is 160, while the sum is 19.

The square root of 111452221 is about 10557.0933973324. The cubic root of 111452221 is about 481.2413197737.

It can be divided in two parts, 11145 and 2221, that added together give a triangular number (13366 = T₁₆₃).

The spelling of 111452221 in words is "one hundred eleven million, four hundred fifty-two thousand, two hundred twenty-one".