219221117655101 has 2 divisors, whose sum is σ = 219221117655102. Its totient is φ = 219221117655100.

The previous prime is 219221117654989. The next prime is 219221117655161. The reversal of 219221117655101 is 101556711122912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 203077605280900 + 16143512374201 = 14250530^2 + 4017899^2 .

It is a cyclic number.

It is not a de Polignac number, because 219221117655101 - 2¹⁸ = 219221117392957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (219221117655161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109610558827550 + 109610558827551.

It is an arithmetic number, because the mean of its divisors is an integer number (109610558827551).

Almost surely, 2^{219221117655101} is an apocalyptic number.

It is an amenable number.

219221117655101 is a deficient number, since it is larger than the sum of its proper divisors (1).

219221117655101 is an equidigital number, since it uses as much as digits as its factorization.

219221117655101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 44.

The spelling of 219221117655101 in words is "two hundred nineteen trillion, two hundred twenty-one billion, one hundred seventeen million, six hundred fifty-five thousand, one hundred one".