21321220223299 has 2 divisors, whose sum is σ = 21321220223300. Its totient is φ = 21321220223298.

The previous prime is 21321220223291. The next prime is 21321220223491. The reversal of 21321220223299 is 99232202212312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21321220223299 - 2³ = 21321220223291 is a prime.

It is not a weakly prime, because it can be changed into another prime (21321220223291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10660610111649 + 10660610111650.

It is an arithmetic number, because the mean of its divisors is an integer number (10660610111650).

Almost surely, 2^{21321220223299} is an apocalyptic number.

21321220223299 is a deficient number, since it is larger than the sum of its proper divisors (1).

21321220223299 is an equidigital number, since it uses as much as digits as its factorization.

21321220223299 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 40.

The spelling of 21321220223299 in words is "twenty-one trillion, three hundred twenty-one billion, two hundred twenty million, two hundred twenty-three thousand, two hundred ninety-nine".