221244413839 has 2 divisors, whose sum is σ = 221244413840. Its totient is φ = 221244413838.

The previous prime is 221244413779. The next prime is 221244413867. The reversal of 221244413839 is 938314442122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221244413839 - 2¹⁷ = 221244282767 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221244413795 and 221244413804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221244413239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110622206919 + 110622206920.

It is an arithmetic number, because the mean of its divisors is an integer number (110622206920).

Almost surely, 2^221244413839 is an apocalyptic number.

221244413839 is a deficient number, since it is larger than the sum of its proper divisors (1).

221244413839 is an equidigital number, since it uses as much as digits as its factorization.

221244413839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 331776, while the sum is 43.

The spelling of 221244413839 in words is "two hundred twenty-one billion, two hundred forty-four million, four hundred thirteen thousand, eight hundred thirty-nine".