122135291 has 2 divisors, whose sum is σ = 122135292. Its totient is φ = 122135290.

The previous prime is 122135243. The next prime is 122135297. The reversal of 122135291 is 192531221.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (192531221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122135291 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122135291.

It is not a weakly prime, because it can be changed into another prime (122135297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61067645 + 61067646.

It is an arithmetic number, because the mean of its divisors is an integer number (61067646).

Almost surely, 2^122135291 is an apocalyptic number.

122135291 is a deficient number, since it is larger than the sum of its proper divisors (1).

122135291 is an equidigital number, since it uses as much as digits as its factorization.

122135291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 26.

The square root of 122135291 is about 11051.4836560527. The cubic root of 122135291 is about 496.1508318486.

The spelling of 122135291 in words is "one hundred twenty-two million, one hundred thirty-five thousand, two hundred ninety-one".