221641294222079 has 2 divisors, whose sum is σ = 221641294222080. Its totient is φ = 221641294222078.

The previous prime is 221641294222031. The next prime is 221641294222087. The reversal of 221641294222079 is 970222492146122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221641294222079 - 2¹² = 221641294217983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221641294222079.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221641294222279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110820647111039 + 110820647111040.

It is an arithmetic number, because the mean of its divisors is an integer number (110820647111040).

Almost surely, 2^{221641294222079} is an apocalyptic number.

221641294222079 is a deficient number, since it is larger than the sum of its proper divisors (1).

221641294222079 is an equidigital number, since it uses as much as digits as its factorization.

221641294222079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3483648, while the sum is 53.

The spelling of 221641294222079 in words is "two hundred twenty-one trillion, six hundred forty-one billion, two hundred ninety-four million, two hundred twenty-two thousand, seventy-nine".