21231233313 has 8 divisors (see below), whose sum is σ = 28568020800. Its totient is φ = 14024300688.

The previous prime is 21231233311. The next prime is 21231233321. The reversal of 21231233313 is 31333213212.

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

It is not a de Polignac number, because 21231233313 - 2¹ = 21231233311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21231233311) 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, 32463333 + ... + 32463986.

It is an arithmetic number, because the mean of its divisors is an integer number (3571002600).

Almost surely, 2^21231233313 is an apocalyptic number.

It is an amenable number.

21231233313 is a deficient number, since it is larger than the sum of its proper divisors (7336787487).

21231233313 is a wasteful number, since it uses less digits than its factorization.

21231233313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64927431.

The product of its digits is 1944, while the sum is 24.

Adding to 21231233313 its reverse (31333213212), we get a palindrome (52564446525).

The spelling of 21231233313 in words is "twenty-one billion, two hundred thirty-one million, two hundred thirty-three thousand, three hundred thirteen".