221636585636093 has 2 divisors, whose sum is σ = 221636585636094. Its totient is φ = 221636585636092.

The previous prime is 221636585636033. The next prime is 221636585636111. The reversal of 221636585636093 is 390636585636122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137993818043929 + 83642767592164 = 11747077^2 + 9145642^2 .

It is a cyclic number.

It is not a de Polignac number, because 221636585636093 - 2¹² = 221636585631997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221636585636003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110818292818046 + 110818292818047.

It is an arithmetic number, because the mean of its divisors is an integer number (110818292818047).

Almost surely, 2^{221636585636093} is an apocalyptic number.

It is an amenable number.

221636585636093 is a deficient number, since it is larger than the sum of its proper divisors (1).

221636585636093 is an equidigital number, since it uses as much as digits as its factorization.

221636585636093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 251942400, while the sum is 65.

The spelling of 221636585636093 in words is "two hundred twenty-one trillion, six hundred thirty-six billion, five hundred eighty-five million, six hundred thirty-six thousand, ninety-three".