21100240002 has 8 divisors (see below), whose sum is σ = 42200480016. Its totient is φ = 7033413332.

The previous prime is 21100239991. The next prime is 21100240027. The reversal of 21100240002 is 20004200112.

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

21100240002 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 21100240002.

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, 1758353328 + ... + 1758353339.

It is an arithmetic number, because the mean of its divisors is an integer number (5275060002).

Almost surely, 2^21100240002 is an apocalyptic number.

21100240002 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21100240002 is a wasteful number, since it uses less digits than its factorization.

21100240002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3516706672.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21100240002 its reverse (20004200112), we get a palindrome (41104440114).

The spelling of 21100240002 in words is "twenty-one billion, one hundred million, two hundred forty thousand, two".