21013321233 has 8 divisors (see below), whose sum is σ = 28492639200. Its totient is φ = 13771442048.

The previous prime is 21013321213. The next prime is 21013321261. The reversal of 21013321233 is 33212331012.

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

It is not a de Polignac number, because 21013321233 - 2¹⁷ = 21013190161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21013321213) 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, 59359488 + ... + 59359841.

It is an arithmetic number, because the mean of its divisors is an integer number (3561579900).

Almost surely, 2^21013321233 is an apocalyptic number.

It is an amenable number.

21013321233 is a deficient number, since it is larger than the sum of its proper divisors (7479317967).

21013321233 is a wasteful number, since it uses less digits than its factorization.

21013321233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118719391.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21013321233 its reverse (33212331012), we get a palindrome (54225652245).

The spelling of 21013321233 in words is "twenty-one billion, thirteen million, three hundred twenty-one thousand, two hundred thirty-three".