221000403411673 has 2 divisors, whose sum is σ = 221000403411674. Its totient is φ = 221000403411672.

The previous prime is 221000403411643. The next prime is 221000403411701. The reversal of 221000403411673 is 376114304000122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220760550308169 + 239853103504 = 14858013^2 + 489748^2 .

It is a cyclic number.

It is not a de Polignac number, because 221000403411673 - 2²¹ = 221000401314521 is a prime.

It is not a weakly prime, because it can be changed into another prime (221000403411643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110500201705836 + 110500201705837.

It is an arithmetic number, because the mean of its divisors is an integer number (110500201705837).

Almost surely, 2^{221000403411673} is an apocalyptic number.

It is an amenable number.

221000403411673 is a deficient number, since it is larger than the sum of its proper divisors (1).

221000403411673 is an equidigital number, since it uses as much as digits as its factorization.

221000403411673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 34.

Adding to 221000403411673 its reverse (376114304000122), we get a palindrome (597114707411795).

The spelling of 221000403411673 in words is "two hundred twenty-one trillion, four hundred three million, four hundred eleven thousand, six hundred seventy-three".