21011303213 has 8 divisors (see below), whose sum is σ = 21796387200. Its totient is φ = 20230256368.

The previous prime is 21011303191. The next prime is 21011303233. The reversal of 21011303213 is 31230311012.

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 21011303213 - 2⁶ = 21011303149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21011303191 and 21011303200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011303233) 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, 998681 + ... + 1019502.

It is an arithmetic number, because the mean of its divisors is an integer number (2724548400).

Almost surely, 2^21011303213 is an apocalyptic number.

It is an amenable number.

21011303213 is a deficient number, since it is larger than the sum of its proper divisors (785083987).

21011303213 is a wasteful number, since it uses less digits than its factorization.

21011303213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2018571.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21011303213 its reverse (31230311012), we get a palindrome (52241614225).

The spelling of 21011303213 in words is "twenty-one billion, eleven million, three hundred three thousand, two hundred thirteen".