21334444412 has 12 divisors (see below), whose sum is σ = 37347262176. Its totient is φ = 10663798080.

The previous prime is 21334444379. The next prime is 21334444429. The reversal of 21334444412 is 21444443312.

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, 841988 + ... + 866955.

It is an arithmetic number, because the mean of its divisors is an integer number (3112271848).

Almost surely, 2^21334444412 is an apocalyptic number.

It is an amenable number.

21334444412 is a deficient number, since it is larger than the sum of its proper divisors (16012817764).

21334444412 is a wasteful number, since it uses less digits than its factorization.

21334444412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1712068 (or 1712066 counting only the distinct ones).

The product of its digits is 36864, while the sum is 32.

Adding to 21334444412 its reverse (21444443312), we get a palindrome (42778887724).

It can be divided in two parts, 21 and 334444412, that added together give a palindrome (334444433).

The spelling of 21334444412 in words is "twenty-one billion, three hundred thirty-four million, four hundred forty-four thousand, four hundred twelve".