21134331244 has 24 divisors (see below), whose sum is σ = 40277623680. Its totient is φ = 9644705664.

The previous prime is 21134331181. The next prime is 21134331271. The reversal of 21134331244 is 44213343112.

It is a happy number.

It is a super-2 number, since 2×21134331244² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2278684 + ... + 2287939.

It is an arithmetic number, because the mean of its divisors is an integer number (1678234320).

Almost surely, 2^21134331244 is an apocalyptic number.

It is an amenable number.

21134331244 is a deficient number, since it is larger than the sum of its proper divisors (19143292436).

21134331244 is a wasteful number, since it uses less digits than its factorization.

21134331244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4566729 (or 4566727 counting only the distinct ones).

The product of its digits is 6912, while the sum is 28.

Adding to 21134331244 its reverse (44213343112), we get a palindrome (65347674356).

The spelling of 21134331244 in words is "twenty-one billion, one hundred thirty-four million, three hundred thirty-one thousand, two hundred forty-four".