21302012133 has 48 divisors (see below), whose sum is σ = 31939747840. Its totient is φ = 13672284192.

The previous prime is 21302012131. The next prime is 21302012191. The reversal of 21302012133 is 33121020312.

It is not a de Polignac number, because 21302012133 - 2¹ = 21302012131 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21302012131) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8009958 + ... + 8012616.

Almost surely, 2^21302012133 is an apocalyptic number.

It is an amenable number.

21302012133 is a deficient number, since it is larger than the sum of its proper divisors (10637735707).

21302012133 is a wasteful number, since it uses less digits than its factorization.

21302012133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2998 (or 2995 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21302012133 its reverse (33121020312), we get a palindrome (54423032445).

The spelling of 21302012133 in words is "twenty-one billion, three hundred two million, twelve thousand, one hundred thirty-three".