221616932903 has 2 divisors, whose sum is σ = 221616932904. Its totient is φ = 221616932902.

The previous prime is 221616932899. The next prime is 221616932917. The reversal of 221616932903 is 309239616122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221616932903 - 2² = 221616932899 is a prime.

It is a super-2 number, since 2×221616932903² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221616932983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110808466451 + 110808466452.

It is an arithmetic number, because the mean of its divisors is an integer number (110808466452).

Almost surely, 2^221616932903 is an apocalyptic number.

221616932903 is a deficient number, since it is larger than the sum of its proper divisors (1).

221616932903 is an equidigital number, since it uses as much as digits as its factorization.

221616932903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 44.

The spelling of 221616932903 in words is "two hundred twenty-one billion, six hundred sixteen million, nine hundred thirty-two thousand, nine hundred three".