21233033411 has 4 divisors (see below), whose sum is σ = 21233481000. Its totient is φ = 21232585824.

The previous prime is 21233033389. The next prime is 21233033413. The reversal of 21233033411 is 11433033212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21233033411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21233033413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142886 + ... + 250763.

It is an arithmetic number, because the mean of its divisors is an integer number (5308370250).

Almost surely, 2^21233033411 is an apocalyptic number.

21233033411 is a deficient number, since it is larger than the sum of its proper divisors (447589).

21233033411 is an equidigital number, since it uses as much as digits as its factorization.

21233033411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447588.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21233033411 its reverse (11433033212), we get a palindrome (32666066623).

The spelling of 21233033411 in words is "twenty-one billion, two hundred thirty-three million, thirty-three thousand, four hundred eleven".