21222121101079 has 2 divisors, whose sum is σ = 21222121101080. Its totient is φ = 21222121101078.

The previous prime is 21222121101011. The next prime is 21222121101089. The reversal of 21222121101079 is 97010112122212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21222121101079 - 2³¹ = 21219973617431 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21222121101079.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21222121101089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611060550539 + 10611060550540.

It is an arithmetic number, because the mean of its divisors is an integer number (10611060550540).

Almost surely, 2^{21222121101079} is an apocalyptic number.

21222121101079 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222121101079 is an equidigital number, since it uses as much as digits as its factorization.

21222121101079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 31.

The spelling of 21222121101079 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred twenty-one million, one hundred one thousand, seventy-nine".