22121321232719 has 2 divisors, whose sum is σ = 22121321232720. Its totient is φ = 22121321232718.

The previous prime is 22121321232667. The next prime is 22121321232733. The reversal of 22121321232719 is 91723212312122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22121321232719 is a prime.

It is a super-2 number, since 2×22121321232719² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22121321232799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060660616359 + 11060660616360.

It is an arithmetic number, because the mean of its divisors is an integer number (11060660616360).

Almost surely, 2^{22121321232719} is an apocalyptic number.

22121321232719 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121321232719 is an equidigital number, since it uses as much as digits as its factorization.

22121321232719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 38.

The spelling of 22121321232719 in words is "twenty-two trillion, one hundred twenty-one billion, three hundred twenty-one million, two hundred thirty-two thousand, seven hundred nineteen".