21331121204002 has 8 divisors (see below), whose sum is σ = 32159101511196. Its totient is φ = 10611420700272.

The previous prime is 21331121203937. The next prime is 21331121204047. The reversal of 21331121204002 is 20040212113312.

It can be written as a sum of positive squares in 2 ways, for example, as 21268985172561 + 62136031441 = 4611831^2 + 249271^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27069950373 + ... + 27069951160.

Almost surely, 2^{21331121204002} is an apocalyptic number.

21331121204002 is a deficient number, since it is larger than the sum of its proper divisors (10827980307194).

21331121204002 is a wasteful number, since it uses less digits than its factorization.

21331121204002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54139901732.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21331121204002 its reverse (20040212113312), we get a palindrome (41371333317314).

The spelling of 21331121204002 in words is "twenty-one trillion, three hundred thirty-one billion, one hundred twenty-one million, two hundred four thousand, two".