122199121 has 4 divisors (see below), whose sum is σ = 133308144. Its totient is φ = 111090100.

The previous prime is 122199071. The next prime is 122199149. The reversal of 122199121 is 121991221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121991221 = 11 ⋅11090111.

It is not a de Polignac number, because 122199121 - 2¹⁵ = 122166353 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122199121.

It is not an unprimeable number, because it can be changed into a prime (122199151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5554495 + ... + 5554516.

It is an arithmetic number, because the mean of its divisors is an integer number (33327036).

Almost surely, 2^122199121 is an apocalyptic number.

122199121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122199121 is a deficient number, since it is larger than the sum of its proper divisors (11109023).

122199121 is a wasteful number, since it uses less digits than its factorization.

122199121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11109022.

The product of its digits is 648, while the sum is 28.

The square root of 122199121 is about 11054.3711263916. The cubic root of 122199121 is about 496.2372491103.

It can be divided in two parts, 1 and 22199121, that added together give a palindrome (22199122).

The spelling of 122199121 in words is "one hundred twenty-two million, one hundred ninety-nine thousand, one hundred twenty-one".