21220011133 has 16 divisors (see below), whose sum is σ = 23033229120. Its totient is φ = 19471286016.

The previous prime is 21220011119. The next prime is 21220011143. The reversal of 21220011133 is 33111002212.

It is a cyclic number.

It is not a de Polignac number, because 21220011133 - 2⁵ = 21220011101 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 (21220011143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 373323 + ... + 426391.

It is an arithmetic number, because the mean of its divisors is an integer number (1439576820).

Almost surely, 2^21220011133 is an apocalyptic number.

It is an amenable number.

21220011133 is a deficient number, since it is larger than the sum of its proper divisors (1813217987).

21220011133 is a wasteful number, since it uses less digits than its factorization.

21220011133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53676.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21220011133 its reverse (33111002212), we get a palindrome (54331013345).

The spelling of 21220011133 in words is "twenty-one billion, two hundred twenty million, eleven thousand, one hundred thirty-three".