21220133233 has 8 divisors (see below), whose sum is σ = 23074321088. Its totient is φ = 19397641104.

The previous prime is 21220133203. The next prime is 21220133267. The reversal of 21220133233 is 33233102212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21220133233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21220133203) 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, 7922535 + ... + 7925212.

It is an arithmetic number, because the mean of its divisors is an integer number (2884290136).

Almost surely, 2^21220133233 is an apocalyptic number.

It is an amenable number.

21220133233 is a deficient number, since it is larger than the sum of its proper divisors (1854187855).

21220133233 is a wasteful number, since it uses less digits than its factorization.

21220133233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15847863.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21220133233 its reverse (33233102212), we get a palindrome (54453235445).

The spelling of 21220133233 in words is "twenty-one billion, two hundred twenty million, one hundred thirty-three thousand, two hundred thirty-three".