21133331310 has 64 divisors (see below), whose sum is σ = 62424617472. Its totient is φ = 4458900096.

The previous prime is 21133331299. The next prime is 21133331311. The reversal of 21133331310 is 1313333112.

It is a super-3 number, since 3×21133331310³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21133331311) 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 31 ways as a sum of consecutive naturals, for example, 3867844 + ... + 3873303.

It is an arithmetic number, because the mean of its divisors is an integer number (975384648).

Almost surely, 2^21133331310 is an apocalyptic number.

21133331310 is an abundant number, since it is smaller than the sum of its proper divisors (41291286162).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21133331310 is a wasteful number, since it uses less digits than its factorization.

21133331310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7741177.

The product of its (nonzero) digits is 486, while the sum is 21.

Adding to 21133331310 its reverse (1313333112), we get a palindrome (22446664422).

The spelling of 21133331310 in words is "twenty-one billion, one hundred thirty-three million, three hundred thirty-one thousand, three hundred ten".