21222021012239 has 2 divisors, whose sum is σ = 21222021012240. Its totient is φ = 21222021012238.

The previous prime is 21222021012217. The next prime is 21222021012263. The reversal of 21222021012239 is 93221012022212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21222021012239 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21222027012239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611010506119 + 10611010506120.

It is an arithmetic number, because the mean of its divisors is an integer number (10611010506120).

Almost surely, 2^{21222021012239} is an apocalyptic number.

21222021012239 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222021012239 is an equidigital number, since it uses as much as digits as its factorization.

21222021012239 is an evil number, because the sum of its binary digits is even.

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

The spelling of 21222021012239 in words is "twenty-one trillion, two hundred twenty-two billion, twenty-one million, twelve thousand, two hundred thirty-nine".