221016054371173 has 2 divisors, whose sum is σ = 221016054371174. Its totient is φ = 221016054371172.

The previous prime is 221016054371171. The next prime is 221016054371261. The reversal of 221016054371173 is 371173450610122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 157480839444769 + 63535214926404 = 12549137^2 + 7970898^2 .

It is a cyclic number.

It is not a de Polignac number, because 221016054371173 - 2¹ = 221016054371171 is a prime.

Together with 221016054371171, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221016054371171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110508027185586 + 110508027185587.

It is an arithmetic number, because the mean of its divisors is an integer number (110508027185587).

Almost surely, 2^{221016054371173} is an apocalyptic number.

It is an amenable number.

221016054371173 is a deficient number, since it is larger than the sum of its proper divisors (1).

221016054371173 is an equidigital number, since it uses as much as digits as its factorization.

221016054371173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 221016054371173 in words is "two hundred twenty-one trillion, sixteen billion, fifty-four million, three hundred seventy-one thousand, one hundred seventy-three".