21123032233 has 8 divisors (see below), whose sum is σ = 21475355400. Its totient is φ = 20773516800.

The previous prime is 21123032221. The next prime is 21123032239. The reversal of 21123032233 is 33223032112.

It can be written as a sum of positive squares in 4 ways, for example, as 7937562649 + 13185469584 = 89093^2 + 114828^2 .

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-21123032233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21123032239) 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, 686760 + ... + 716857.

It is an arithmetic number, because the mean of its divisors is an integer number (2684419425).

Almost surely, 2^21123032233 is an apocalyptic number.

It is an amenable number.

21123032233 is a deficient number, since it is larger than the sum of its proper divisors (352323167).

21123032233 is a wasteful number, since it uses less digits than its factorization.

21123032233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403867.

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

Adding to 21123032233 its reverse (33223032112), we get a palindrome (54346064345).

The spelling of 21123032233 in words is "twenty-one billion, one hundred twenty-three million, thirty-two thousand, two hundred thirty-three".