122102191 has 4 divisors (see below), whose sum is σ = 122158872. Its totient is φ = 122045512.

The previous prime is 122102173. The next prime is 122102203. The reversal of 122102191 is 191201221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 122102191 - 2¹³ = 122093999 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 (122102111) 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, 24976 + ... + 29461.

It is an arithmetic number, because the mean of its divisors is an integer number (30539718).

Almost surely, 2^122102191 is an apocalyptic number.

122102191 is a deficient number, since it is larger than the sum of its proper divisors (56681).

122102191 is an equidigital number, since it uses as much as digits as its factorization.

122102191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56680.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 122102191 is about 11049.9860180907. The cubic root of 122102191 is about 496.1060070313.

The spelling of 122102191 in words is "one hundred twenty-two million, one hundred two thousand, one hundred ninety-one".