21210102100093 has 2 divisors, whose sum is σ = 21210102100094. Its totient is φ = 21210102100092.

The previous prime is 21210102100067. The next prime is 21210102100133. The reversal of 21210102100093 is 39000120101212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11782481883844 + 9427620216249 = 3432562^2 + 3070443^2 .

It is a cyclic number.

It is not a de Polignac number, because 21210102100093 - 2³³ = 21201512165501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21210102100493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605051050046 + 10605051050047.

It is an arithmetic number, because the mean of its divisors is an integer number (10605051050047).

Almost surely, 2^{21210102100093} is an apocalyptic number.

It is an amenable number.

21210102100093 is a deficient number, since it is larger than the sum of its proper divisors (1).

21210102100093 is an equidigital number, since it uses as much as digits as its factorization.

21210102100093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 22.

The spelling of 21210102100093 in words is "twenty-one trillion, two hundred ten billion, one hundred two million, one hundred thousand, ninety-three".