21214240132 has 12 divisors (see below), whose sum is σ = 37332323280. Its totient is φ = 10547862056.

The previous prime is 21214240127. The next prime is 21214240133. The reversal of 21214240132 is 23104241212.

It is not an unprimeable number, because it can be changed into a prime (21214240133) 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, 14813698 + ... + 14815129.

It is an arithmetic number, because the mean of its divisors is an integer number (3111026940).

Almost surely, 2^21214240132 is an apocalyptic number.

It is an amenable number.

21214240132 is a deficient number, since it is larger than the sum of its proper divisors (16118083148).

21214240132 is a wasteful number, since it uses less digits than its factorization.

21214240132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29629010 (or 29629008 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21214240132 its reverse (23104241212), we get a palindrome (44318481344).

The spelling of 21214240132 in words is "twenty-one billion, two hundred fourteen million, two hundred forty thousand, one hundred thirty-two".