21030021303 has 16 divisors (see below), whose sum is σ = 28204280832. Its totient is φ = 13937940000.

The previous prime is 21030021283. The next prime is 21030021317. The reversal of 21030021303 is 30312003012.

It is not a de Polignac number, because 21030021303 - 2⁶ = 21030021239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21030021373) 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, 2640978 + ... + 2648928.

It is an arithmetic number, because the mean of its divisors is an integer number (1762767552).

Almost surely, 2^21030021303 is an apocalyptic number.

21030021303 is a deficient number, since it is larger than the sum of its proper divisors (7174259529).

21030021303 is a wasteful number, since it uses less digits than its factorization.

21030021303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13006.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 21030021303 its reverse (30312003012), we get a palindrome (51342024315).

The spelling of 21030021303 in words is "twenty-one billion, thirty million, twenty-one thousand, three hundred three".