221022100133 has 2 divisors, whose sum is σ = 221022100134. Its totient is φ = 221022100132.

The previous prime is 221022100129. The next prime is 221022100139. The reversal of 221022100133 is 331001220122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 186224182369 + 34797917764 = 431537^2 + 186542^2 .

It is a cyclic number.

It is not a de Polignac number, because 221022100133 - 2² = 221022100129 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221022100139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110511050066 + 110511050067.

It is an arithmetic number, because the mean of its divisors is an integer number (110511050067).

Almost surely, 2^221022100133 is an apocalyptic number.

It is an amenable number.

221022100133 is a deficient number, since it is larger than the sum of its proper divisors (1).

221022100133 is an equidigital number, since it uses as much as digits as its factorization.

221022100133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 221022100133 its reverse (331001220122), we get a palindrome (552023320255).

The spelling of 221022100133 in words is "two hundred twenty-one billion, twenty-two million, one hundred thousand, one hundred thirty-three".