21303301252 has 6 divisors (see below), whose sum is σ = 37280777198. Its totient is φ = 10651650624.

The previous prime is 21303301249. The next prime is 21303301301. The reversal of 21303301252 is 25210330312.

It can be written as a sum of positive squares in only one way, i.e., 19975864896 + 1327436356 = 141336^2 + 36434^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2662912653 + ... + 2662912660.

Almost surely, 2^21303301252 is an apocalyptic number.

It is an amenable number.

21303301252 is a deficient number, since it is larger than the sum of its proper divisors (15977475946).

21303301252 is a wasteful number, since it uses less digits than its factorization.

21303301252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5325825317 (or 5325825315 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

Adding to 21303301252 its reverse (25210330312), we get a palindrome (46513631564).

The spelling of 21303301252 in words is "twenty-one billion, three hundred three million, three hundred one thousand, two hundred fifty-two".