221100222073 has 2 divisors, whose sum is σ = 221100222074. Its totient is φ = 221100222072.

The previous prime is 221100222043. The next prime is 221100222107. The reversal of 221100222073 is 370222001122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127955013264 + 93145208809 = 357708^2 + 305197^2 .

It is a cyclic number.

It is not a de Polignac number, because 221100222073 - 2¹³ = 221100213881 is a prime.

It is not a weakly prime, because it can be changed into another prime (221100222043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110550111036 + 110550111037.

It is an arithmetic number, because the mean of its divisors is an integer number (110550111037).

Almost surely, 2^221100222073 is an apocalyptic number.

It is an amenable number.

221100222073 is a deficient number, since it is larger than the sum of its proper divisors (1).

221100222073 is an equidigital number, since it uses as much as digits as its factorization.

221100222073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 22.

Adding to 221100222073 its reverse (370222001122), we get a palindrome (591322223195).

The spelling of 221100222073 in words is "two hundred twenty-one billion, one hundred million, two hundred twenty-two thousand, seventy-three".