22021219951 has 2 divisors, whose sum is σ = 22021219952. Its totient is φ = 22021219950.

The previous prime is 22021219939. The next prime is 22021219973. The reversal of 22021219951 is 15991212022.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22021219951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22021219921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11010609975 + 11010609976.

It is an arithmetic number, because the mean of its divisors is an integer number (11010609976).

Almost surely, 2^22021219951 is an apocalyptic number.

22021219951 is a deficient number, since it is larger than the sum of its proper divisors (1).

22021219951 is an equidigital number, since it uses as much as digits as its factorization.

22021219951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 34.

The spelling of 22021219951 in words is "twenty-two billion, twenty-one million, two hundred nineteen thousand, nine hundred fifty-one".