21268886212 has 12 divisors (see below), whose sum is σ = 42537772480. Its totient is φ = 9115236936.

The previous prime is 21268886183. The next prime is 21268886213.

21268886212 is nontrivially palindromic in base 10.

21268886212 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (21268886213) 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 3 ways as a sum of consecutive naturals, for example, 379801512 + ... + 379801567.

Almost surely, 2^21268886212 is an apocalyptic number.

It is an amenable number.

21268886212 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.

21268886212 is a wasteful number, since it uses less digits than its factorization.

21268886212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759603090 (or 759603088 counting only the distinct ones).

The product of its digits is 294912, while the sum is 46.

The spelling of 21268886212 in words is "twenty-one billion, two hundred sixty-eight million, eight hundred eighty-six thousand, two hundred twelve".