21132220233 has 8 divisors (see below), whose sum is σ = 28196099968. Its totient is φ = 14078243664.

The previous prime is 21132220231. The next prime is 21132220259. The reversal of 21132220233 is 33202223112.

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 21132220233 - 2¹ = 21132220231 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21132220231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2470810 + ... + 2479347.

It is an arithmetic number, because the mean of its divisors is an integer number (3524512496).

Almost surely, 2^21132220233 is an apocalyptic number.

It is an amenable number.

21132220233 is a deficient number, since it is larger than the sum of its proper divisors (7063879735).

21132220233 is a wasteful number, since it uses less digits than its factorization.

21132220233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4951583.

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

Adding to 21132220233 its reverse (33202223112), we get a palindrome (54334443345).

The spelling of 21132220233 in words is "twenty-one billion, one hundred thirty-two million, two hundred twenty thousand, two hundred thirty-three".