122021191 has 4 divisors (see below), whose sum is σ = 122130400. Its totient is φ = 121911984.

The previous prime is 122021171. The next prime is 122021197. The reversal of 122021191 is 191120221.

It is a happy number.

122021191 is nontrivially palindromic in base 16.

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 122021191 - 2⁷ = 122021063 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 (122021197) 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, 52911 + ... + 55168.

It is an arithmetic number, because the mean of its divisors is an integer number (30532600).

Almost surely, 2^122021191 is an apocalyptic number.

122021191 is a deficient number, since it is larger than the sum of its proper divisors (109209).

122021191 is a wasteful number, since it uses less digits than its factorization.

122021191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109208.

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

The square root of 122021191 is about 11046.3202470325. The cubic root of 122021191 is about 495.9962807018.

The spelling of 122021191 in words is "one hundred twenty-two million, twenty-one thousand, one hundred ninety-one".