21100223310329 has 2 divisors, whose sum is σ = 21100223310330. Its totient is φ = 21100223310328.

The previous prime is 21100223310311. The next prime is 21100223310343. The reversal of 21100223310329 is 92301332200112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19824328812304 + 1275894498025 = 4452452^2 + 1129555^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21100223310329 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (21100223315329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550111655164 + 10550111655165.

It is an arithmetic number, because the mean of its divisors is an integer number (10550111655165).

Almost surely, 2^{21100223310329} is an apocalyptic number.

It is an amenable number.

21100223310329 is a deficient number, since it is larger than the sum of its proper divisors (1).

21100223310329 is an equidigital number, since it uses as much as digits as its factorization.

21100223310329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 29.

The spelling of 21100223310329 in words is "twenty-one trillion, one hundred billion, two hundred twenty-three million, three hundred ten thousand, three hundred twenty-nine".