221361335399 has 2 divisors, whose sum is σ = 221361335400. Its totient is φ = 221361335398.

The previous prime is 221361335387. The next prime is 221361335473. The reversal of 221361335399 is 993533163122.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221361335399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221361335329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110680667699 + 110680667700.

It is an arithmetic number, because the mean of its divisors is an integer number (110680667700).

Almost surely, 2^221361335399 is an apocalyptic number.

221361335399 is a deficient number, since it is larger than the sum of its proper divisors (1).

221361335399 is an equidigital number, since it uses as much as digits as its factorization.

221361335399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 787320, while the sum is 47.

The spelling of 221361335399 in words is "two hundred twenty-one billion, three hundred sixty-one million, three hundred thirty-five thousand, three hundred ninety-nine".