21302120120303 has 16 divisors (see below), whose sum is σ = 23292057600000. Its totient is φ = 19321096397280.

The previous prime is 21302120120287. The next prime is 21302120120311. The reversal of 21302120120303 is 30302102120312.

It is a cyclic number.

It is not a de Polignac number, because 21302120120303 - 2⁴ = 21302120120287 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 (21302120125303) 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 15 ways as a sum of consecutive naturals, for example, 24939698 + ... + 25779696.

It is an arithmetic number, because the mean of its divisors is an integer number (1455753600000).

Almost surely, 2^{21302120120303} is an apocalyptic number.

21302120120303 is a deficient number, since it is larger than the sum of its proper divisors (1989937479697).

21302120120303 is a wasteful number, since it uses less digits than its factorization.

21302120120303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845302.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21302120120303 its reverse (30302102120312), we get a palindrome (51604222240615).

Subtracting 21302120120303 from its reverse (30302102120312), we obtain a square (8999982000009 = 2999997²).

The spelling of 21302120120303 in words is "twenty-one trillion, three hundred two billion, one hundred twenty million, one hundred twenty thousand, three hundred three".