21112321033 has 8 divisors (see below), whose sum is σ = 21146711040. Its totient is φ = 21077960160.

The previous prime is 21112321007. The next prime is 21112321037. The reversal of 21112321033 is 33012321112.

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-21112321033 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21112321033.

It is not an unprimeable number, because it can be changed into a prime (21112321037) 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, 1782216 + ... + 1794022.

It is an arithmetic number, because the mean of its divisors is an integer number (2643338880).

Almost surely, 2^21112321033 is an apocalyptic number.

It is an amenable number.

21112321033 is a deficient number, since it is larger than the sum of its proper divisors (34390007).

21112321033 is a wasteful number, since it uses less digits than its factorization.

21112321033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14567.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21112321033 its reverse (33012321112), we get a palindrome (54124642145).

The spelling of 21112321033 in words is "twenty-one billion, one hundred twelve million, three hundred twenty-one thousand, thirty-three".