21222202112009 has 2 divisors, whose sum is σ = 21222202112010. Its totient is φ = 21222202112008.

The previous prime is 21222202111991. The next prime is 21222202112039. The reversal of 21222202112009 is 90021120222212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10634642766400 + 10587559345609 = 3261080^2 + 3253853^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21222202112009 is a prime.

It is not a weakly prime, because it can be changed into another prime (21222202112039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611101056004 + 10611101056005.

It is an arithmetic number, because the mean of its divisors is an integer number (10611101056005).

Almost surely, 2^{21222202112009} is an apocalyptic number.

It is an amenable number.

21222202112009 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222202112009 is an equidigital number, since it uses as much as digits as its factorization.

21222202112009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 26.

The spelling of 21222202112009 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred two million, one hundred twelve thousand, nine".