21304221412 has 6 divisors (see below), whose sum is σ = 37282387478. Its totient is φ = 10652110704.

The previous prime is 21304221397. The next prime is 21304221413. The reversal of 21304221412 is 21412240312.

It can be written as a sum of positive squares in only one way, i.e., 11695124736 + 9609096676 = 108144^2 + 98026^2 .

It is not an unprimeable number, because it can be changed into a prime (21304221413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2663027673 + ... + 2663027680.

Almost surely, 2^21304221412 is an apocalyptic number.

It is an amenable number.

21304221412 is a deficient number, since it is larger than the sum of its proper divisors (15978166066).

21304221412 is a wasteful number, since it uses less digits than its factorization.

21304221412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5326055357 (or 5326055355 counting only the distinct ones).

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

Adding to 21304221412 its reverse (21412240312), we get a palindrome (42716461724).

The spelling of 21304221412 in words is "twenty-one billion, three hundred four million, two hundred twenty-one thousand, four hundred twelve".