122191243 has 4 divisors (see below), whose sum is σ = 126132928. Its totient is φ = 118249560.

The previous prime is 122191231. The next prime is 122191271. The reversal of 122191243 is 342191221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342191221 = 109 ⋅3139369.

It is a cyclic number.

It is not a de Polignac number, because 122191243 - 2¹⁷ = 122060171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122191283) 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, 1970796 + ... + 1970857.

It is an arithmetic number, because the mean of its divisors is an integer number (31533232).

Almost surely, 2^122191243 is an apocalyptic number.

122191243 is a deficient number, since it is larger than the sum of its proper divisors (3941685).

122191243 is an equidigital number, since it uses as much as digits as its factorization.

122191243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3941684.

The product of its digits is 864, while the sum is 25.

The square root of 122191243 is about 11054.0147910160. The cubic root of 122191243 is about 496.2265849827.

The spelling of 122191243 in words is "one hundred twenty-two million, one hundred ninety-one thousand, two hundred forty-three".