21303203122 has 8 divisors (see below), whose sum is σ = 31973978736. Its totient is φ = 10645210212.

The previous prime is 21303203107. The next prime is 21303203143. The reversal of 21303203122 is 22130230312.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21303203122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3191508 + ... + 3198175.

It is an arithmetic number, because the mean of its divisors is an integer number (3996747342).

Almost surely, 2^21303203122 is an apocalyptic number.

21303203122 is a deficient number, since it is larger than the sum of its proper divisors (10670775614).

21303203122 is a wasteful number, since it uses less digits than its factorization.

21303203122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6391352.

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

Adding to 21303203122 its reverse (22130230312), we get a palindrome (43433433434).

The spelling of 21303203122 in words is "twenty-one billion, three hundred three million, two hundred three thousand, one hundred twenty-two".