111098889225 has 81 divisors (see below), whose sum is σ = 206884813863. Its totient is φ = 59180744880.

The previous prime is 111098889217. The next prime is 111098889227. The reversal of 111098889225 is 522988890111.

The square root of 111098889225 is 333315.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 39995600121 + 71103289104 = 199989^2 + 266652^2 .

It is a tau number, because it is divible by the number of its divisors (81).

It is not a de Polignac number, because 111098889225 - 2³ = 111098889217 is a prime.

It is a super-2 number, since 2×111098889225² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (111098889227) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 134992164 + ... + 134992986.

Almost surely, 2^111098889225 is an apocalyptic number.

111098889225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

111098889225 is the 333315-th square number.

111098889225 is the 166658-th centered octagonal number.

It is an amenable number.

111098889225 is a deficient number, since it is larger than the sum of its proper divisors (95785924638).

111098889225 is an frugal number, since it uses more digits than its factorization.

111098889225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680 (or 831 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 54.

The spelling of 111098889225 in words is "one hundred eleven billion, ninety-eight million, eight hundred eighty-nine thousand, two hundred twenty-five".