21133446116 has 12 divisors (see below), whose sum is σ = 37120003200. Its totient is φ = 10527730920.

The previous prime is 21133446101. The next prime is 21133446121. The reversal of 21133446116 is 61164433112.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9746816 + ... + 9748983.

It is an arithmetic number, because the mean of its divisors is an integer number (3093333600).

Almost surely, 2^21133446116 is an apocalyptic number.

It is an amenable number.

21133446116 is a deficient number, since it is larger than the sum of its proper divisors (15986557084).

21133446116 is a wasteful number, since it uses less digits than its factorization.

21133446116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19496074 (or 19496072 counting only the distinct ones).

The product of its digits is 10368, while the sum is 32.

Adding to 21133446116 its reverse (61164433112), we get a palindrome (82297879228).

The spelling of 21133446116 in words is "twenty-one billion, one hundred thirty-three million, four hundred forty-six thousand, one hundred sixteen".