21100105002 has 8 divisors (see below), whose sum is σ = 42200210016. Its totient is φ = 7033368332.

The previous prime is 21100104997. The next prime is 21100105027. The reversal of 21100105002 is 20050100112.

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

21100105002 is an admirable number.

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, 1758342078 + ... + 1758342089.

It is an arithmetic number, because the mean of its divisors is an integer number (5275026252).

Almost surely, 2^21100105002 is an apocalyptic number.

21100105002 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.

21100105002 is a wasteful number, since it uses less digits than its factorization.

21100105002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3516684172.

The product of its (nonzero) digits is 20, while the sum is 12.

Adding to 21100105002 its reverse (20050100112), we get a palindrome (41150205114).

The spelling of 21100105002 in words is "twenty-one billion, one hundred million, one hundred five thousand, two".