21214204132 has 12 divisors (see below), whose sum is σ = 40499844336. Its totient is φ = 9642820040.

The previous prime is 21214204127. The next prime is 21214204147. The reversal of 21214204132 is 23140241212.

It is a Harshad number since it is a multiple of its sum of digits (22).

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, 241070458 + ... + 241070545.

It is an arithmetic number, because the mean of its divisors is an integer number (3374987028).

Almost surely, 2^21214204132 is an apocalyptic number.

21214204132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21214204132 is a deficient number, since it is larger than the sum of its proper divisors (19285640204).

21214204132 is a wasteful number, since it uses less digits than its factorization.

21214204132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482141018 (or 482141016 counting only the distinct ones).

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

Adding to 21214204132 its reverse (23140241212), we get a palindrome (44354445344).

The spelling of 21214204132 in words is "twenty-one billion, two hundred fourteen million, two hundred four thousand, one hundred thirty-two".