21230013311 has 8 divisors (see below), whose sum is σ = 23857139040. Its totient is φ = 18744894432.

The previous prime is 21230013281. The next prime is 21230013353. The reversal of 21230013311 is 11331003212.

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 21230013311 - 2²² = 21225819007 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 21230013311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21230013391) 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, 35501396 + ... + 35501993.

It is an arithmetic number, because the mean of its divisors is an integer number (2982142380).

Almost surely, 2^21230013311 is an apocalyptic number.

21230013311 is a deficient number, since it is larger than the sum of its proper divisors (2627125729).

21230013311 is a wasteful number, since it uses less digits than its factorization.

21230013311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71003425.

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

Adding to 21230013311 its reverse (11331003212), we get a palindrome (32561016523).

The spelling of 21230013311 in words is "twenty-one billion, two hundred thirty million, thirteen thousand, three hundred eleven".