221917882033 has 2 divisors, whose sum is σ = 221917882034. Its totient is φ = 221917882032.

The previous prime is 221917882009. The next prime is 221917882079. The reversal of 221917882033 is 330288719122.

It is an a-pointer prime, because the next prime (221917882079) can be obtained adding 221917882033 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207929616049 + 13988265984 = 455993^2 + 118272^2 .

It is a cyclic number.

It is not a de Polignac number, because 221917882033 - 2⁵ = 221917882001 is a prime.

It is not a weakly prime, because it can be changed into another prime (221917882733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110958941016 + 110958941017.

It is an arithmetic number, because the mean of its divisors is an integer number (110958941017).

Almost surely, 2^221917882033 is an apocalyptic number.

It is an amenable number.

221917882033 is a deficient number, since it is larger than the sum of its proper divisors (1).

221917882033 is an equidigital number, since it uses as much as digits as its factorization.

221917882033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 221917882033 in words is "two hundred twenty-one billion, nine hundred seventeen million, eight hundred eighty-two thousand, thirty-three".