21023021303303 has 16 divisors (see below), whose sum is σ = 23432612300640. Its totient is φ = 18743880038400.

The previous prime is 21023021303279. The next prime is 21023021303357. The reversal of 21023021303303 is 30330312032012.

It is a cyclic number.

It is not a de Polignac number, because 21023021303303 - 2¹⁴ = 21023021286919 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 (21023021303503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3594533 + ... + 7413953.

It is an arithmetic number, because the mean of its divisors is an integer number (1464538268790).

Almost surely, 2^{21023021303303} is an apocalyptic number.

21023021303303 is a deficient number, since it is larger than the sum of its proper divisors (2409590997337).

21023021303303 is a wasteful number, since it uses less digits than its factorization.

21023021303303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3836498.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 21023021303303 its reverse (30330312032012), we get a palindrome (51353333335315).

The spelling of 21023021303303 in words is "twenty-one trillion, twenty-three billion, twenty-one million, three hundred three thousand, three hundred three".