21241303012 has 6 divisors (see below), whose sum is σ = 37172280278. Its totient is φ = 10620651504.

The previous prime is 21241303003. The next prime is 21241303019. The reversal of 21241303012 is 21030314212.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18188298496 + 3053004516 = 134864^2 + 55254^2 .

It is not an unprimeable number, because it can be changed into a prime (21241303019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2655162873 + ... + 2655162880.

Almost surely, 2^21241303012 is an apocalyptic number.

It is an amenable number.

21241303012 is a deficient number, since it is larger than the sum of its proper divisors (15930977266).

21241303012 is a wasteful number, since it uses less digits than its factorization.

21241303012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5310325757 (or 5310325755 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21241303012 its reverse (21030314212), we get a palindrome (42271617224).

The spelling of 21241303012 in words is "twenty-one billion, two hundred forty-one million, three hundred three thousand, twelve".