21130130133 has 48 divisors (see below), whose sum is σ = 36157605120. Its totient is φ = 11634319872.

The previous prime is 21130130129. The next prime is 21130130149. The reversal of 21130130133 is 33103103112.

It is a happy number.

It is not a de Polignac number, because 21130130133 - 2² = 21130130129 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21130130183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 907485 + ... + 930477.

It is an arithmetic number, because the mean of its divisors is an integer number (753283440).

Almost surely, 2^21130130133 is an apocalyptic number.

It is an amenable number.

21130130133 is a deficient number, since it is larger than the sum of its proper divisors (15027474987).

21130130133 is a wasteful number, since it uses less digits than its factorization.

21130130133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23538 (or 23535 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 21130130133 its reverse (33103103112), we get a palindrome (54233233245).

The spelling of 21130130133 in words is "twenty-one billion, one hundred thirty million, one hundred thirty thousand, one hundred thirty-three".