122219999 has 16 divisors (see below), whose sum is σ = 140534784. Its totient is φ = 105204000.

The previous prime is 122219983. The next prime is 122220019. The reversal of 122219999 is 999912221.

It is a happy number.

It is not a de Polignac number, because 122219999 - 2⁴ = 122219983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122219939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23162 + ... + 27944.

It is an arithmetic number, because the mean of its divisors is an integer number (8783424).

Almost surely, 2^122219999 is an apocalyptic number.

122219999 is a deficient number, since it is larger than the sum of its proper divisors (18314785).

122219999 is a wasteful number, since it uses less digits than its factorization.

122219999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4918.

The product of its digits is 52488, while the sum is 44.

The square root of 122219999 is about 11055.3154183859. The cubic root of 122219999 is about 496.2655085916.

The spelling of 122219999 in words is "one hundred twenty-two million, two hundred nineteen thousand, nine hundred ninety-nine".