122331998 has 4 divisors (see below), whose sum is σ = 183498000. Its totient is φ = 61165998.

The previous prime is 122331997. The next prime is 122332019. The reversal of 122331998 is 899133221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 899133221 = 7 ⋅128447603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122331991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30582998 + ... + 30583001.

It is an arithmetic number, because the mean of its divisors is an integer number (45874500).

Almost surely, 2^122331998 is an apocalyptic number.

122331998 is a deficient number, since it is larger than the sum of its proper divisors (61166002).

122331998 is an equidigital number, since it uses as much as digits as its factorization.

122331998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61166001.

The product of its digits is 23328, while the sum is 38.

The square root of 122331998 is about 11060.3796499035. The cubic root of 122331998 is about 496.4170502708.

The spelling of 122331998 in words is "one hundred twenty-two million, three hundred thirty-one thousand, nine hundred ninety-eight".