21134304212 has 12 divisors (see below), whose sum is σ = 42268608480. Its totient is φ = 9057558936.

The previous prime is 21134304211. The next prime is 21134304227. The reversal of 21134304212 is 21240343112.

21134304212 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21134304211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 377398262 + ... + 377398317.

It is an arithmetic number, because the mean of its divisors is an integer number (3522384040).

Almost surely, 2^21134304212 is an apocalyptic number.

It is an amenable number.

21134304212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21134304212 is a wasteful number, since it uses less digits than its factorization.

21134304212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754796590 (or 754796588 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21134304212 its reverse (21240343112), we get a palindrome (42374647324).

The spelling of 21134304212 in words is "twenty-one billion, one hundred thirty-four million, three hundred four thousand, two hundred twelve".