12122122291 has 2 divisors, whose sum is σ = 12122122292. Its totient is φ = 12122122290.

The previous prime is 12122122267. The next prime is 12122122429. The reversal of 12122122291 is 19222122121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12122122291 - 2²³ = 12113733683 is a prime.

It is not a weakly prime, because it can be changed into another prime (12122222291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061061145 + 6061061146.

It is an arithmetic number, because the mean of its divisors is an integer number (6061061146).

Almost surely, 2^12122122291 is an apocalyptic number.

12122122291 is a deficient number, since it is larger than the sum of its proper divisors (1).

12122122291 is an equidigital number, since it uses as much as digits as its factorization.

12122122291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 25.

The spelling of 12122122291 in words is "twelve billion, one hundred twenty-two million, one hundred twenty-two thousand, two hundred ninety-one".