21273100033 has 8 divisors (see below), whose sum is σ = 21478115520. Its totient is φ = 21068199600.

The previous prime is 21273100031. The next prime is 21273100067. The reversal of 21273100033 is 33000137212.

It is a happy number.

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 21273100033 - 2¹ = 21273100031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21273099977 and 21273100013.

It is not an unprimeable number, because it can be changed into a prime (21273100031) 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, 369148 + ... + 422866.

It is an arithmetic number, because the mean of its divisors is an integer number (2684764440).

Almost surely, 2^21273100033 is an apocalyptic number.

It is an amenable number.

21273100033 is a deficient number, since it is larger than the sum of its proper divisors (205015487).

21273100033 is a wasteful number, since it uses less digits than its factorization.

21273100033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57527.

The product of its (nonzero) digits is 756, while the sum is 22.

Adding to 21273100033 its reverse (33000137212), we get a palindrome (54273237245).

The spelling of 21273100033 in words is "twenty-one billion, two hundred seventy-three million, one hundred thousand, thirty-three".