221571465396233 has 2 divisors, whose sum is σ = 221571465396234. Its totient is φ = 221571465396232.

The previous prime is 221571465396191. The next prime is 221571465396247. The reversal of 221571465396233 is 332693564175122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143003043558544 + 78568421837689 = 11958388^2 + 8863883^2 .

It is a cyclic number.

It is not a de Polignac number, because 221571465396233 - 2¹⁰ = 221571465395209 is a prime.

It is not a weakly prime, because it can be changed into another prime (221571465396283) 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, 110785732698116 + 110785732698117.

It is an arithmetic number, because the mean of its divisors is an integer number (110785732698117).

Almost surely, 2^{221571465396233} is an apocalyptic number.

It is an amenable number.

221571465396233 is a deficient number, since it is larger than the sum of its proper divisors (1).

221571465396233 is an equidigital number, since it uses as much as digits as its factorization.

221571465396233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48988800, while the sum is 59.

The spelling of 221571465396233 in words is "two hundred twenty-one trillion, five hundred seventy-one billion, four hundred sixty-five million, three hundred ninety-six thousand, two hundred thirty-three".