21004012334233 has 4 divisors (see below), whose sum is σ = 21348340405348. Its totient is φ = 20659684263120.

The previous prime is 21004012334231. The next prime is 21004012334237. The reversal of 21004012334233 is 33243321040012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11804941532224 + 9199070802009 = 3435832^2 + 3032997^2 .

It is a cyclic number.

It is not a de Polignac number, because 21004012334233 - 2¹ = 21004012334231 is a prime.

It is a super-2 number, since 2×21004012334233² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21004012334231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172164035466 + ... + 172164035587.

It is an arithmetic number, because the mean of its divisors is an integer number (5337085101337).

Almost surely, 2^{21004012334233} is an apocalyptic number.

It is an amenable number.

21004012334233 is a deficient number, since it is larger than the sum of its proper divisors (344328071115).

21004012334233 is an equidigital number, since it uses as much as digits as its factorization.

21004012334233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344328071114.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 21004012334233 its reverse (33243321040012), we get a palindrome (54247333374245).

The spelling of 21004012334233 in words is "twenty-one trillion, four billion, twelve million, three hundred thirty-four thousand, two hundred thirty-three".