21122234291 has 2 divisors, whose sum is σ = 21122234292. Its totient is φ = 21122234290.

The previous prime is 21122234281. The next prime is 21122234347. The reversal of 21122234291 is 19243222112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21122234291 - 2⁶ = 21122234227 is a prime.

It is a super-2 number, since 2×21122234291² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21122234281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10561117145 + 10561117146.

It is an arithmetic number, because the mean of its divisors is an integer number (10561117146).

Almost surely, 2^21122234291 is an apocalyptic number.

21122234291 is a deficient number, since it is larger than the sum of its proper divisors (1).

21122234291 is an equidigital number, since it uses as much as digits as its factorization.

21122234291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 29.

The spelling of 21122234291 in words is "twenty-one billion, one hundred twenty-two million, two hundred thirty-four thousand, two hundred ninety-one".