122152291 has 4 divisors (see below), whose sum is σ = 122593552. Its totient is φ = 121711032.

The previous prime is 122152271. The next prime is 122152297. The reversal of 122152291 is 192251221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 192251221 = 7577 ⋅25373.

It is a cyclic number.

It is not a de Polignac number, because 122152291 - 2¹⁵ = 122119523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (122152297) 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, 220215 + ... + 220768.

It is an arithmetic number, because the mean of its divisors is an integer number (30648388).

Almost surely, 2^122152291 is an apocalyptic number.

122152291 is a deficient number, since it is larger than the sum of its proper divisors (441261).

122152291 is an equidigital number, since it uses as much as digits as its factorization.

122152291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441260.

The product of its digits is 720, while the sum is 25.

The square root of 122152291 is about 11052.2527567913. The cubic root of 122152291 is about 496.1738505103.

The spelling of 122152291 in words is "one hundred twenty-two million, one hundred fifty-two thousand, two hundred ninety-one".