122242391 has 2 divisors, whose sum is σ = 122242392. Its totient is φ = 122242390.

The previous prime is 122242363. The next prime is 122242411. The reversal of 122242391 is 193242221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122242391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122242391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122242321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61121195 + 61121196.

It is an arithmetic number, because the mean of its divisors is an integer number (61121196).

Almost surely, 2^122242391 is an apocalyptic number.

122242391 is a deficient number, since it is larger than the sum of its proper divisors (1).

122242391 is an equidigital number, since it uses as much as digits as its factorization.

122242391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 26.

The square root of 122242391 is about 11056.3280975195. The cubic root of 122242391 is about 496.2958137757.

The spelling of 122242391 in words is "one hundred twenty-two million, two hundred forty-two thousand, three hundred ninety-one".