21203330133 has 8 divisors (see below), whose sum is σ = 28275645888. Its totient is φ = 14133283904.

The previous prime is 21203330129. The next prime is 21203330153. The reversal of 21203330133 is 33103330212.

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 21203330133 - 2² = 21203330129 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21203330153) 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, 545460 + ... + 583037.

It is an arithmetic number, because the mean of its divisors is an integer number (3534455736).

Almost surely, 2^21203330133 is an apocalyptic number.

It is an amenable number.

21203330133 is a deficient number, since it is larger than the sum of its proper divisors (7072315755).

21203330133 is a wasteful number, since it uses less digits than its factorization.

21203330133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1134763.

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 21203330133 its reverse (33103330212), we get a palindrome (54306660345).

The spelling of 21203330133 in words is "twenty-one billion, two hundred three million, three hundred thirty thousand, one hundred thirty-three".