122312291 has 4 divisors (see below), whose sum is σ = 128749800. Its totient is φ = 115874784.

The previous prime is 122312273. The next prime is 122312299. The reversal of 122312291 is 192213221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 192213221 = 47 ⋅4089643.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122312291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122312299) 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, 3218726 + ... + 3218763.

It is an arithmetic number, because the mean of its divisors is an integer number (32187450).

Almost surely, 2^122312291 is an apocalyptic number.

122312291 is a deficient number, since it is larger than the sum of its proper divisors (6437509).

122312291 is an equidigital number, since it uses as much as digits as its factorization.

122312291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6437508.

The product of its digits is 432, while the sum is 23.

The square root of 122312291 is about 11059.4887314016. The cubic root of 122312291 is about 496.3903921700.

The spelling of 122312291 in words is "one hundred twenty-two million, three hundred twelve thousand, two hundred ninety-one".