122121099 has 24 divisors (see below), whose sum is σ = 185332992. Its totient is φ = 77338800.

The previous prime is 122121089. The next prime is 122121107. The reversal of 122121099 is 990121221.

It is not a de Polignac number, because 122121099 - 2²³ = 113732491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (122121079) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29304 + ... + 33210.

It is an arithmetic number, because the mean of its divisors is an integer number (7722208).

Almost surely, 2^122121099 is an apocalyptic number.

122121099 is a deficient number, since it is larger than the sum of its proper divisors (63211893).

122121099 is a wasteful number, since it uses less digits than its factorization.

122121099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4087 (or 4084 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 122121099 is about 11050.8415516647. The cubic root of 122121099 is about 496.1316136923.

The spelling of 122121099 in words is "one hundred twenty-two million, one hundred twenty-one thousand, ninety-nine".