221647657024093 has 2 divisors, whose sum is σ = 221647657024094. Its totient is φ = 221647657024092.

The previous prime is 221647657023943. The next prime is 221647657024117. The reversal of 221647657024093 is 390420756746122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 167631360246009 + 54016296778084 = 12947253^2 + 7349578^2 .

It is a cyclic number.

It is not a de Polignac number, because 221647657024093 - 2²¹ = 221647654926941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221647657024393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110823828512046 + 110823828512047.

It is an arithmetic number, because the mean of its divisors is an integer number (110823828512047).

Almost surely, 2^{221647657024093} is an apocalyptic number.

It is an amenable number.

221647657024093 is a deficient number, since it is larger than the sum of its proper divisors (1).

221647657024093 is an equidigital number, since it uses as much as digits as its factorization.

221647657024093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30481920, while the sum is 58.

The spelling of 221647657024093 in words is "two hundred twenty-one trillion, six hundred forty-seven billion, six hundred fifty-seven million, twenty-four thousand, ninety-three".