221114432358661 has 2 divisors, whose sum is σ = 221114432358662. Its totient is φ = 221114432358660.

The previous prime is 221114432358649. The next prime is 221114432358671. The reversal of 221114432358661 is 166853234411122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134115067609636 + 86999364749025 = 11580806^2 + 9327345^2 .

It is a cyclic number.

It is not a de Polignac number, because 221114432358661 - 2⁴¹ = 218915409103109 is a prime.

It is a super-3 number, since 3×221114432358661³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221114432358671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110557216179330 + 110557216179331.

It is an arithmetic number, because the mean of its divisors is an integer number (110557216179331).

Almost surely, 2^{221114432358661} is an apocalyptic number.

It is an amenable number.

221114432358661 is a deficient number, since it is larger than the sum of its proper divisors (1).

221114432358661 is an equidigital number, since it uses as much as digits as its factorization.

221114432358661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1658880, while the sum is 49.

Adding to 221114432358661 its reverse (166853234411122), we get a palindrome (387967666769783).

The spelling of 221114432358661 in words is "two hundred twenty-one trillion, one hundred fourteen billion, four hundred thirty-two million, three hundred fifty-eight thousand, six hundred sixty-one".