21321044424002 has 8 divisors (see below), whose sum is σ = 31981615575996. Its totient is φ = 10660505898672.

The previous prime is 21321044423989. The next prime is 21321044424083. The reversal of 21321044424002 is 20042444012312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21210547351081 + 110497072921 = 4605491^2 + 332411^2 .

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

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, 6451673 + ... + 9179660.

Almost surely, 2^{21321044424002} is an apocalyptic number.

21321044424002 is a deficient number, since it is larger than the sum of its proper divisors (10660571151994).

21321044424002 is a wasteful number, since it uses less digits than its factorization.

21321044424002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16313332.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 21321044424002 its reverse (20042444012312), we get a palindrome (41363488436314).

The spelling of 21321044424002 in words is "twenty-one trillion, three hundred twenty-one billion, forty-four million, four hundred twenty-four thousand, two".