122189121 has 8 divisors (see below), whose sum is σ = 181020960. Its totient is φ = 81459396.

The previous prime is 122189117. The next prime is 122189131. The reversal of 122189121 is 121981221.

It is not a de Polignac number, because 122189121 - 2² = 122189117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 4525523 = 122189121 / (1 + 2 + 2 + 1 + 8 + 9 + 1 + 2 + 1).

It is not an unprimeable number, because it can be changed into a prime (122189131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2262735 + ... + 2262788.

It is an arithmetic number, because the mean of its divisors is an integer number (22627620).

Almost surely, 2^122189121 is an apocalyptic number.

It is an amenable number.

122189121 is a deficient number, since it is larger than the sum of its proper divisors (58831839).

122189121 is an equidigital number, since it uses as much as digits as its factorization.

122189121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4525532 (or 4525526 counting only the distinct ones).

The product of its digits is 576, while the sum is 27.

The square root of 122189121 is about 11053.9188073732. The cubic root of 122189121 is about 496.2237124394.

The spelling of 122189121 in words is "one hundred twenty-two million, one hundred eighty-nine thousand, one hundred twenty-one".