21433320212 has 12 divisors (see below), whose sum is σ = 37515001440. Its totient is φ = 10714748376.

The previous prime is 21433320193. The next prime is 21433320221. The reversal of 21433320212 is 21202333412.

It is a congruent 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, 452558 + ... + 497669.

It is an arithmetic number, because the mean of its divisors is an integer number (3126250120).

Almost surely, 2^21433320212 is an apocalyptic number.

It is an amenable number.

21433320212 is a deficient number, since it is larger than the sum of its proper divisors (16081681228).

21433320212 is a wasteful number, since it uses less digits than its factorization.

21433320212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955870 (or 955868 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21433320212 its reverse (21202333412), we get a palindrome (42635653624).

The spelling of 21433320212 in words is "twenty-one billion, four hundred thirty-three million, three hundred twenty thousand, two hundred twelve".