21303033320101 has 4 divisors (see below), whose sum is σ = 22941728190892. Its totient is φ = 19664338449312.

The previous prime is 21303033320039. The next prime is 21303033320117. The reversal of 21303033320101 is 10102333030312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8610415791201 + 12692617528900 = 2934351^2 + 3562670^2 .

It is a cyclic number.

It is not a de Polignac number, because 21303033320101 - 2²⁵ = 21302999765669 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 (21303033320131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 819347435376 + ... + 819347435401.

It is an arithmetic number, because the mean of its divisors is an integer number (5735432047723).

Almost surely, 2^{21303033320101} is an apocalyptic number.

It is an amenable number.

21303033320101 is a deficient number, since it is larger than the sum of its proper divisors (1638694870791).

21303033320101 is a wasteful number, since it uses less digits than its factorization.

21303033320101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1638694870790.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 21303033320101 its reverse (10102333030312), we get a palindrome (31405366350413).

The spelling of 21303033320101 in words is "twenty-one trillion, three hundred three billion, thirty-three million, three hundred twenty thousand, one hundred one".