21303211213 has 8 divisors (see below), whose sum is σ = 21465501120. Its totient is φ = 21141335040.

The previous prime is 21303211169. The next prime is 21303211229. The reversal of 21303211213 is 31211230312.

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 21303211213 - 2¹³ = 21303203021 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 (21303211273) 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, 333 + ... + 206413.

It is an arithmetic number, because the mean of its divisors is an integer number (2683187640).

Almost surely, 2^21303211213 is an apocalyptic number.

It is an amenable number.

21303211213 is a deficient number, since it is larger than the sum of its proper divisors (162289907).

21303211213 is a wasteful number, since it uses less digits than its factorization.

21303211213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206867.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21303211213 its reverse (31211230312), we get a palindrome (52514441525).

The spelling of 21303211213 in words is "twenty-one billion, three hundred three million, two hundred eleven thousand, two hundred thirteen".