221222110010509 has 2 divisors, whose sum is σ = 221222110010510. Its totient is φ = 221222110010508.

The previous prime is 221222110010483. The next prime is 221222110010581. The reversal of 221222110010509 is 905010011222122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196395279092100 + 24826830918409 = 14014110^2 + 4982653^2 .

It is a cyclic number.

It is not a de Polignac number, because 221222110010509 - 2¹⁵ = 221222109977741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221222114010509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110611055005254 + 110611055005255.

It is an arithmetic number, because the mean of its divisors is an integer number (110611055005255).

Almost surely, 2^{221222110010509} is an apocalyptic number.

It is an amenable number.

221222110010509 is a deficient number, since it is larger than the sum of its proper divisors (1).

221222110010509 is an equidigital number, since it uses as much as digits as its factorization.

221222110010509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 28.

The spelling of 221222110010509 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, one hundred ten million, ten thousand, five hundred nine".