221475496428611 has 2 divisors, whose sum is σ = 221475496428612. Its totient is φ = 221475496428610.

The previous prime is 221475496428517. The next prime is 221475496428631. The reversal of 221475496428611 is 116824694574122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221475496428611 - 2³⁸ = 221200618521667 is a prime.

It is not a weakly prime, because it can be changed into another prime (221475496428631) 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, 110737748214305 + 110737748214306.

It is an arithmetic number, because the mean of its divisors is an integer number (110737748214306).

Almost surely, 2^{221475496428611} is an apocalyptic number.

221475496428611 is a deficient number, since it is larger than the sum of its proper divisors (1).

221475496428611 is an equidigital number, since it uses as much as digits as its factorization.

221475496428611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46448640, while the sum is 62.

The spelling of 221475496428611 in words is "two hundred twenty-one trillion, four hundred seventy-five billion, four hundred ninety-six million, four hundred twenty-eight thousand, six hundred eleven".