21210102100133 has 2 divisors, whose sum is σ = 21210102100134. Its totient is φ = 21210102100132.

The previous prime is 21210102100093. The next prime is 21210102100141. The reversal of 21210102100133 is 33100120101212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12948720055489 + 8261382044644 = 3598433^2 + 2874262^2 .

It is a cyclic number.

It is not a de Polignac number, because 21210102100133 - 2²⁴ = 21210085322917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21210102100333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605051050066 + 10605051050067.

It is an arithmetic number, because the mean of its divisors is an integer number (10605051050067).

Almost surely, 2^{21210102100133} is an apocalyptic number.

It is an amenable number.

21210102100133 is a deficient number, since it is larger than the sum of its proper divisors (1).

21210102100133 is an equidigital number, since it uses as much as digits as its factorization.

21210102100133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21210102100133 its reverse (33100120101212), we get a palindrome (54310222201345).

The spelling of 21210102100133 in words is "twenty-one trillion, two hundred ten billion, one hundred two million, one hundred thousand, one hundred thirty-three".