122217998 has 64 divisors (see below), whose sum is σ = 235146240. Its totient is φ = 46413312.

The previous prime is 122217989. The next prime is 122218003. The reversal of 122217998 is 899712221.

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 31 ways as a sum of consecutive naturals, for example, 454208 + ... + 454476.

It is an arithmetic number, because the mean of its divisors is an integer number (3674160).

Almost surely, 2^122217998 is an apocalyptic number.

122217998 is a deficient number, since it is larger than the sum of its proper divisors (112928242).

122217998 is a wasteful number, since it uses less digits than its factorization.

122217998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401.

The product of its digits is 36288, while the sum is 41.

The square root of 122217998 is about 11055.2249185623. The cubic root of 122217998 is about 496.2628002713.

The spelling of 122217998 in words is "one hundred twenty-two million, two hundred seventeen thousand, nine hundred ninety-eight".