221657273332117 has 4 divisors (see below), whose sum is σ = 253322598093856. Its totient is φ = 189991948570380.

The previous prime is 221657273332063. The next prime is 221657273332129. The reversal of 221657273332117 is 711233372756122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221657273332117 - 2¹⁵ = 221657273299349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221657273332717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15832662380859 + ... + 15832662380872.

It is an arithmetic number, because the mean of its divisors is an integer number (63330649523464).

Almost surely, 2^{221657273332117} is an apocalyptic number.

It is an amenable number.

221657273332117 is a deficient number, since it is larger than the sum of its proper divisors (31665324761739).

221657273332117 is an equidigital number, since it uses as much as digits as its factorization.

221657273332117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31665324761738.

The product of its digits is 4445280, while the sum is 52.

The spelling of 221657273332117 in words is "two hundred twenty-one trillion, six hundred fifty-seven billion, two hundred seventy-three million, three hundred thirty-two thousand, one hundred seventeen".