21220002222071 has 2 divisors, whose sum is σ = 21220002222072. Its totient is φ = 21220002222070.

The previous prime is 21220002222031. The next prime is 21220002222119. The reversal of 21220002222071 is 17022220002212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21220002222071 - 2⁶ = 21220002222007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21220002222011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610001111035 + 10610001111036.

It is an arithmetic number, because the mean of its divisors is an integer number (10610001111036).

Almost surely, 2^{21220002222071} is an apocalyptic number.

21220002222071 is a deficient number, since it is larger than the sum of its proper divisors (1).

21220002222071 is an equidigital number, since it uses as much as digits as its factorization.

21220002222071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 23.

Adding to 21220002222071 its reverse (17022220002212), we get a palindrome (38242222224283).

The spelling of 21220002222071 in words is "twenty-one trillion, two hundred twenty billion, two million, two hundred twenty-two thousand, seventy-one".