122012291 has 2 divisors, whose sum is σ = 122012292. Its totient is φ = 122012290.

The previous prime is 122012287. The next prime is 122012299. The reversal of 122012291 is 192210221.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 122012291 - 2² = 122012287 is a prime.

It is not a weakly prime, because it can be changed into another prime (122012299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61006145 + 61006146.

It is an arithmetic number, because the mean of its divisors is an integer number (61006146).

Almost surely, 2^122012291 is an apocalyptic number.

122012291 is a deficient number, since it is larger than the sum of its proper divisors (1).

122012291 is an equidigital number, since it uses as much as digits as its factorization.

122012291 is an evil number, because the sum of its binary digits is even.

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

The square root of 122012291 is about 11045.9173906018. The cubic root of 122012291 is about 495.9842213915.

The spelling of 122012291 in words is "one hundred twenty-two million, twelve thousand, two hundred ninety-one".