21212030323 has 8 divisors (see below), whose sum is σ = 23159807856. Its totient is φ = 19267488000.

The previous prime is 21212030303. The next prime is 21212030363. The reversal of 21212030323 is 32303021212.

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

It is a cyclic number.

It is not a de Polignac number, because 21212030323 - 2²⁹ = 20675159411 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21212030323.

It is not an unprimeable number, because it can be changed into a prime (21212030303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 795078 + ... + 821323.

It is an arithmetic number, because the mean of its divisors is an integer number (2894975982).

Almost surely, 2^21212030323 is an apocalyptic number.

21212030323 is a deficient number, since it is larger than the sum of its proper divisors (1947777533).

21212030323 is a wasteful number, since it uses less digits than its factorization.

21212030323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1617605.

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

Adding to 21212030323 its reverse (32303021212), we get a palindrome (53515051535).

The spelling of 21212030323 in words is "twenty-one billion, two hundred twelve million, thirty thousand, three hundred twenty-three".