21203130133 has 8 divisors (see below), whose sum is σ = 22830888960. Its totient is φ = 19617650880.

The previous prime is 21203130131. The next prime is 21203130149. The reversal of 21203130133 is 33103130212.

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 21203130133 - 2¹ = 21203130131 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 21203130133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21203130131) 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, 10568853 + ... + 10570858.

It is an arithmetic number, because the mean of its divisors is an integer number (2853861120).

Almost surely, 2^21203130133 is an apocalyptic number.

It is an amenable number.

21203130133 is a deficient number, since it is larger than the sum of its proper divisors (1627758827).

21203130133 is a wasteful number, since it uses less digits than its factorization.

21203130133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21139787.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21203130133 its reverse (33103130212), we get a palindrome (54306260345).

The spelling of 21203130133 in words is "twenty-one billion, two hundred three million, one hundred thirty thousand, one hundred thirty-three".