21000012021303 has 16 divisors (see below), whose sum is σ = 32118977502720. Its totient is φ = 11955397175136.

The previous prime is 21000012021301. The next prime is 21000012021349. The reversal of 21000012021303 is 30312021000012.

It is not a de Polignac number, because 21000012021303 - 2¹ = 21000012021301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000012021301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1858731475 + ... + 1858742772.

It is an arithmetic number, because the mean of its divisors is an integer number (2007436093920).

Almost surely, 2^{21000012021303} is an apocalyptic number.

21000012021303 is a deficient number, since it is larger than the sum of its proper divisors (11118965481417).

21000012021303 is a wasteful number, since it uses less digits than its factorization.

21000012021303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3717474526.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21000012021303 its reverse (30312021000012), we get a palindrome (51312033021315).

The spelling of 21000012021303 in words is "twenty-one trillion, twelve million, twenty-one thousand, three hundred three".