21020011133 has 8 divisors (see below), whose sum is σ = 23550676320. Its totient is φ = 18592638480.

The previous prime is 21020011109. The next prime is 21020011139. The reversal of 21020011133 is 33111002012.

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 21020011133 - 2⁶ = 21020011069 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 (21020011139) 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, 25822703 + ... + 25823516.

It is an arithmetic number, because the mean of its divisors is an integer number (2943834540).

Almost surely, 2^21020011133 is an apocalyptic number.

It is an amenable number.

21020011133 is a deficient number, since it is larger than the sum of its proper divisors (2530665187).

21020011133 is a wasteful number, since it uses less digits than its factorization.

21020011133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51646267.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21020011133 its reverse (33111002012), we get a palindrome (54131013145).

The spelling of 21020011133 in words is "twenty-one billion, twenty million, eleven thousand, one hundred thirty-three".