21223233133 has 8 divisors (see below), whose sum is σ = 21919890168. Its totient is φ = 20537547264.

The previous prime is 21223233107. The next prime is 21223233173. The reversal of 21223233133 is 33133232212.

It can be written as a sum of positive squares in 4 ways, for example, as 12220639209 + 9002593924 = 110547^2 + 94882^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 21223233133 - 2⁹ = 21223232621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21223233098 and 21223233107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21223233173) 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, 2738860 + ... + 2746597.

It is an arithmetic number, because the mean of its divisors is an integer number (2739986271).

Almost surely, 2^21223233133 is an apocalyptic number.

It is an amenable number.

21223233133 is a deficient number, since it is larger than the sum of its proper divisors (696657035).

21223233133 is an equidigital number, since it uses as much as digits as its factorization.

21223233133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5485583.

The product of its digits is 3888, while the sum is 25.

Adding to 21223233133 its reverse (33133232212), we get a palindrome (54356465345).

The spelling of 21223233133 in words is "twenty-one billion, two hundred twenty-three million, two hundred thirty-three thousand, one hundred thirty-three".