21201232233 has 8 divisors (see below), whose sum is σ = 28274633248. Its totient is φ = 14130993024.

The previous prime is 21201232231. The next prime is 21201232271. The reversal of 21201232233 is 33223210212.

It is a happy number.

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

It is not a de Polignac number, because 21201232233 - 2¹ = 21201232231 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21201232231) 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, 774760 + ... + 801657.

It is an arithmetic number, because the mean of its divisors is an integer number (3534329156).

Almost surely, 2^21201232233 is an apocalyptic number.

It is an amenable number.

21201232233 is a deficient number, since it is larger than the sum of its proper divisors (7073401015).

21201232233 is a wasteful number, since it uses less digits than its factorization.

21201232233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580903.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21201232233 its reverse (33223210212), we get a palindrome (54424442445).

The spelling of 21201232233 in words is "twenty-one billion, two hundred one million, two hundred thirty-two thousand, two hundred thirty-three".