111201998 has 12 divisors (see below), whose sum is σ = 177193032. Its totient is φ = 52330080.

The previous prime is 111201971. The next prime is 111202019. The reversal of 111201998 is 899102111.

It is a super-3 number, since 3×111201998³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 95618 + ... + 96773.

It is an arithmetic number, because the mean of its divisors is an integer number (14766086).

Almost surely, 2^111201998 is an apocalyptic number.

111201998 is a deficient number, since it is larger than the sum of its proper divisors (65991034).

111201998 is a wasteful number, since it uses less digits than its factorization.

111201998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192427 (or 192410 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 32.

The square root of 111201998 is about 10545.2357963205. The cubic root of 111201998 is about 480.8809026210.

The spelling of 111201998 in words is "one hundred eleven million, two hundred one thousand, nine hundred ninety-eight".