21220013133 has 12 divisors (see below), whose sum is σ = 33437596608. Its totient is φ = 12860613960.

The previous prime is 21220013117. The next prime is 21220013137. The reversal of 21220013133 is 33131002212.

It is not a de Polignac number, because 21220013133 - 2⁴ = 21220013117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220013137) 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 11 ways as a sum of consecutive naturals, for example, 107171685 + ... + 107171882.

It is an arithmetic number, because the mean of its divisors is an integer number (2786466384).

Almost surely, 2^21220013133 is an apocalyptic number.

It is an amenable number.

21220013133 is a deficient number, since it is larger than the sum of its proper divisors (12217583475).

21220013133 is a wasteful number, since it uses less digits than its factorization.

21220013133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214343584 (or 214343581 counting only the distinct ones).

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

Adding to 21220013133 its reverse (33131002212), we get a palindrome (54351015345).

The spelling of 21220013133 in words is "twenty-one billion, two hundred twenty million, thirteen thousand, one hundred thirty-three".