21910100201321 has 2 divisors, whose sum is σ = 21910100201322. Its totient is φ = 21910100201320.

The previous prime is 21910100201287. The next prime is 21910100201333. The reversal of 21910100201321 is 12310200101912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21643560325696 + 266539875625 = 4652264^2 + 516275^2 .

It is a cyclic number.

It is not a de Polignac number, because 21910100201321 - 2¹⁰ = 21910100200297 is a prime.

It is not a weakly prime, because it can be changed into another prime (21910100200321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10955050100660 + 10955050100661.

It is an arithmetic number, because the mean of its divisors is an integer number (10955050100661).

Almost surely, 2^{21910100201321} is an apocalyptic number.

It is an amenable number.

21910100201321 is a deficient number, since it is larger than the sum of its proper divisors (1).

21910100201321 is an equidigital number, since it uses as much as digits as its factorization.

21910100201321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 23.

The spelling of 21910100201321 in words is "twenty-one trillion, nine hundred ten billion, one hundred million, two hundred one thousand, three hundred twenty-one".