21323211213 has 8 divisors (see below), whose sum is σ = 29348075776. Its totient is φ = 13756910400.

The previous prime is 21323211191. The next prime is 21323211229. The reversal of 21323211213 is 31211232312.

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

It is not a de Polignac number, because 21323211213 - 2¹⁰ = 21323210189 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 21323211213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323211253) 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, 114640828 + ... + 114641013.

It is an arithmetic number, because the mean of its divisors is an integer number (3668509472).

Almost surely, 2^21323211213 is an apocalyptic number.

It is an amenable number.

21323211213 is a deficient number, since it is larger than the sum of its proper divisors (8024864563).

21323211213 is a wasteful number, since it uses less digits than its factorization.

21323211213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229281875.

The product of its digits is 432, while the sum is 21.

Adding to 21323211213 its reverse (31211232312), we get a palindrome (52534443525).

The spelling of 21323211213 in words is "twenty-one billion, three hundred twenty-three million, two hundred eleven thousand, two hundred thirteen".