122201291 has 4 divisors (see below), whose sum is σ = 122463432. Its totient is φ = 121939152.

The previous prime is 122201257. The next prime is 122201309. The reversal of 122201291 is 192102221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122201291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122201221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130370 + ... + 131303.

It is an arithmetic number, because the mean of its divisors is an integer number (30615858).

Almost surely, 2^122201291 is an apocalyptic number.

122201291 is a deficient number, since it is larger than the sum of its proper divisors (262141).

122201291 is an equidigital number, since it uses as much as digits as its factorization.

122201291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262140.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 122201291 is about 11054.4692771747. The cubic root of 122201291 is about 496.2401864704.

The spelling of 122201291 in words is "one hundred twenty-two million, two hundred one thousand, two hundred ninety-one".