221013022309 has 2 divisors, whose sum is σ = 221013022310. Its totient is φ = 221013022308.

The previous prime is 221013022273. The next prime is 221013022313. The reversal of 221013022309 is 903220310122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 142208181025 + 78804841284 = 377105^2 + 280722^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221013022309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221013022709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110506511154 + 110506511155.

It is an arithmetic number, because the mean of its divisors is an integer number (110506511155).

Almost surely, 2^221013022309 is an apocalyptic number.

It is an amenable number.

221013022309 is a deficient number, since it is larger than the sum of its proper divisors (1).

221013022309 is an equidigital number, since it uses as much as digits as its factorization.

221013022309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The spelling of 221013022309 in words is "two hundred twenty-one billion, thirteen million, twenty-two thousand, three hundred nine".