21004334004142 has 8 divisors (see below), whose sum is σ = 31511310444432. Its totient is φ = 10500563856000.

The previous prime is 21004334004109. The next prime is 21004334004149. The reversal of 21004334004142 is 24140043340012.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21004334004142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21004334004149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 801556659 + ... + 801582862.

It is an arithmetic number, because the mean of its divisors is an integer number (3938913805554).

Almost surely, 2^{21004334004142} is an apocalyptic number.

21004334004142 is a deficient number, since it is larger than the sum of its proper divisors (10506976440290).

21004334004142 is a wasteful number, since it uses less digits than its factorization.

21004334004142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1603146074.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 21004334004142 its reverse (24140043340012), we get a palindrome (45144377344154).

The spelling of 21004334004142 in words is "twenty-one trillion, four billion, three hundred thirty-four million, four thousand, one hundred forty-two".