21013221303301 has 4 divisors (see below), whose sum is σ = 21013635758752. Its totient is φ = 21012806847852.

The previous prime is 21013221303257. The next prime is 21013221303311. The reversal of 21013221303301 is 10330312231012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21013221303301 - 2⁹ = 21013221302789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21013221303311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207151665 + ... + 207253078.

It is an arithmetic number, because the mean of its divisors is an integer number (5253408939688).

Almost surely, 2^{21013221303301} is an apocalyptic number.

It is an amenable number.

21013221303301 is a deficient number, since it is larger than the sum of its proper divisors (414455451).

21013221303301 is an equidigital number, since it uses as much as digits as its factorization.

21013221303301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414455450.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 21013221303301 its reverse (10330312231012), we get a palindrome (31343533534313).

The spelling of 21013221303301 in words is "twenty-one trillion, thirteen billion, two hundred twenty-one million, three hundred three thousand, three hundred one".