21120311133 has 12 divisors (see below), whose sum is σ = 30508952448. Its totient is φ = 14079359880.

The previous prime is 21120311101. The next prime is 21120311153. The reversal of 21120311133 is 33111302112.

It is not a de Polignac number, because 21120311133 - 2⁵ = 21120311101 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120311153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112066 + ... + 234092.

It is an arithmetic number, because the mean of its divisors is an integer number (2542412704).

Almost surely, 2^21120311133 is an apocalyptic number.

It is an amenable number.

21120311133 is a deficient number, since it is larger than the sum of its proper divisors (9388641315).

21120311133 is a wasteful number, since it uses less digits than its factorization.

21120311133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141264 (or 141261 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 21120311133 its reverse (33111302112), we get a palindrome (54231613245).

The spelling of 21120311133 in words is "twenty-one billion, one hundred twenty million, three hundred eleven thousand, one hundred thirty-three".