221032107074561 has 2 divisors, whose sum is σ = 221032107074562. Its totient is φ = 221032107074560.

The previous prime is 221032107074483. The next prime is 221032107074563. The reversal of 221032107074561 is 165470701230122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220645950472336 + 386156602225 = 14854156^2 + 621415^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221032107074561 is a prime.

It is a super-2 number, since 2×221032107074561² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 221032107074563, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (221032107074563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110516053537280 + 110516053537281.

It is an arithmetic number, because the mean of its divisors is an integer number (110516053537281).

Almost surely, 2^{221032107074561} is an apocalyptic number.

It is an amenable number.

221032107074561 is a deficient number, since it is larger than the sum of its proper divisors (1).

221032107074561 is an equidigital number, since it uses as much as digits as its factorization.

221032107074561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141120, while the sum is 41.

The spelling of 221032107074561 in words is "two hundred twenty-one trillion, thirty-two billion, one hundred seven million, seventy-four thousand, five hundred sixty-one".