123112198 has 16 divisors (see below), whose sum is σ = 213307344. Its totient is φ = 52668160.

The previous prime is 123112189. The next prime is 123112201. The reversal of 123112198 is 891211321.

It is a super-2 number, since 2×123112198² = 30313226592782408, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 164215 + ... + 164962.

It is an arithmetic number, because the mean of its divisors is an integer number (13331709).

Almost surely, 2^123112198 is an apocalyptic number.

123112198 is a deficient number, since it is larger than the sum of its proper divisors (90195146).

123112198 is a wasteful number, since it uses less digits than its factorization.

123112198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329207.

The product of its digits is 864, while the sum is 28.

The square root of 123112198 is about 11095.5936299055. The cubic root of 123112198 is about 497.4701519933.

The spelling of 123112198 in words is "one hundred twenty-three million, one hundred twelve thousand, one hundred ninety-eight".