21218482212 has 24 divisors (see below), whose sum is σ = 50106297696. Its totient is φ = 6987612288.

The previous prime is 21218482163. The next prime is 21218482223. The reversal of 21218482212 is 21228481212.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10650853 + ... + 10652844.

It is an arithmetic number, because the mean of its divisors is an integer number (2087762404).

Almost surely, 2^21218482212 is an apocalyptic number.

It is an amenable number.

21218482212 is an abundant number, since it is smaller than the sum of its proper divisors (28887815484).

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

21218482212 is a wasteful number, since it uses less digits than its factorization.

21218482212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21303787 (or 21303785 counting only the distinct ones).

The product of its digits is 8192, while the sum is 33.

The spelling of 21218482212 in words is "twenty-one billion, two hundred eighteen million, four hundred eighty-two thousand, two hundred twelve".