221657221403039 has 2 divisors, whose sum is σ = 221657221403040. Its totient is φ = 221657221403038.

The previous prime is 221657221403021. The next prime is 221657221403047. The reversal of 221657221403039 is 930304122756122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221657221403039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221657221402984 and 221657221403002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221657221403069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110828610701519 + 110828610701520.

It is an arithmetic number, because the mean of its divisors is an integer number (110828610701520).

Almost surely, 2^{221657221403039} is an apocalyptic number.

221657221403039 is a deficient number, since it is larger than the sum of its proper divisors (1).

221657221403039 is an equidigital number, since it uses as much as digits as its factorization.

221657221403039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 47.

The spelling of 221657221403039 in words is "two hundred twenty-one trillion, six hundred fifty-seven billion, two hundred twenty-one million, four hundred three thousand, thirty-nine".