21002004411042 has 32 divisors (see below), whose sum is σ = 42043781265984. Its totient is φ = 6994040587200.

The previous prime is 21002004411023. The next prime is 21002004411067. The reversal of 21002004411042 is 24011440020012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73246617 + ... + 73532787.

It is an arithmetic number, because the mean of its divisors is an integer number (1313868164562).

Almost surely, 2^{21002004411042} is an apocalyptic number.

21002004411042 is an abundant number, since it is smaller than the sum of its proper divisors (21041776854942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21002004411042 is a wasteful number, since it uses less digits than its factorization.

21002004411042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297714.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 21002004411042 its reverse (24011440020012), we get a palindrome (45013444431054).

The spelling of 21002004411042 in words is "twenty-one trillion, two billion, four million, four hundred eleven thousand, forty-two".