122115990 has 16 divisors (see below), whose sum is σ = 293078448. Its totient is φ = 32564256.

The previous prime is 122115989. The next prime is 122116003. The reversal of 122115990 is 99511221.

It is a super-3 number, since 3×122115990³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 4070533 = 122115990 / (1 + 2 + 2 + 1 + 1 + 5 + 9 + 9 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2035237 + ... + 2035296.

It is an arithmetic number, because the mean of its divisors is an integer number (18317403).

Almost surely, 2^122115990 is an apocalyptic number.

122115990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

122115990 is an abundant number, since it is smaller than the sum of its proper divisors (170962458).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

122115990 is a wasteful number, since it uses less digits than its factorization.

122115990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4070543.

The product of its (nonzero) digits is 1620, while the sum is 30.

The square root of 122115990 is about 11050.6103903812. The cubic root of 122115990 is about 496.1246949540.

The spelling of 122115990 in words is "one hundred twenty-two million, one hundred fifteen thousand, nine hundred ninety".