21301200442 has 8 divisors (see below), whose sum is σ = 31952420532. Its totient is φ = 10650393600.

The previous prime is 21301200419. The next prime is 21301200443. The reversal of 21301200442 is 24400210312.

It can be written as a sum of positive squares in 2 ways, for example, as 21277765161 + 23435281 = 145869^2 + 4841^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21301200442² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21301200443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143092 + ... + 251152.

Almost surely, 2^21301200442 is an apocalyptic number.

21301200442 is a deficient number, since it is larger than the sum of its proper divisors (10651220090).

21301200442 is a wasteful number, since it uses less digits than its factorization.

21301200442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206624.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21301200442 its reverse (24400210312), we get a palindrome (45701410754).

The spelling of 21301200442 in words is "twenty-one billion, three hundred one million, two hundred thousand, four hundred forty-two".