21212023303 has 8 divisors (see below), whose sum is σ = 21377575296. Its totient is φ = 21047115000.

The previous prime is 21212023297. The next prime is 21212023331. The reversal of 21212023303 is 30332021212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21212023303 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 (21212023603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94653 + ... + 226678.

It is an arithmetic number, because the mean of its divisors is an integer number (2672196912).

Almost surely, 2^21212023303 is an apocalyptic number.

21212023303 is a deficient number, since it is larger than the sum of its proper divisors (165551993).

21212023303 is a wasteful number, since it uses less digits than its factorization.

21212023303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321845.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21212023303 its reverse (30332021212), we get a palindrome (51544044515).

The spelling of 21212023303 in words is "twenty-one billion, two hundred twelve million, twenty-three thousand, three hundred three".