21321100199941 has 2 divisors, whose sum is σ = 21321100199942. Its totient is φ = 21321100199940.

The previous prime is 21321100199929. The next prime is 21321100200097. The reversal of 21321100199941 is 14999100112312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20832423705025 + 488676494916 = 4564255^2 + 699054^2 .

It is a cyclic number.

It is not a de Polignac number, because 21321100199941 - 2¹⁷ = 21321100068869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21321100199741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10660550099970 + 10660550099971.

It is an arithmetic number, because the mean of its divisors is an integer number (10660550099971).

Almost surely, 2^{21321100199941} is an apocalyptic number.

It is an amenable number.

21321100199941 is a deficient number, since it is larger than the sum of its proper divisors (1).

21321100199941 is an equidigital number, since it uses as much as digits as its factorization.

21321100199941 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 43.

The spelling of 21321100199941 in words is "twenty-one trillion, three hundred twenty-one billion, one hundred million, one hundred ninety-nine thousand, nine hundred forty-one".