122121191 has 8 divisors (see below), whose sum is σ = 127607424. Its totient is φ = 116649720.

The previous prime is 122121187. The next prime is 122121199. The reversal of 122121191 is 191121221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 122121191 - 2² = 122121187 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122121199) 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, 15380 + ... + 21926.

It is an arithmetic number, because the mean of its divisors is an integer number (15950928).

Almost surely, 2^122121191 is an apocalyptic number.

122121191 is a deficient number, since it is larger than the sum of its proper divisors (5486233).

122121191 is an equidigital number, since it uses as much as digits as its factorization.

122121191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7381.

The product of its digits is 72, while the sum is 20.

The square root of 122121191 is about 11050.8457142429. The cubic root of 122121191 is about 496.1317382792.

The spelling of 122121191 in words is "one hundred twenty-two million, one hundred twenty-one thousand, one hundred ninety-one".