21100103130 has 64 divisors (see below), whose sum is σ = 52090915968. Its totient is φ = 5467733760.

The previous prime is 21100103113. The next prime is 21100103161. The reversal of 21100103130 is 3130100112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82432 + ... + 221348.

It is an arithmetic number, because the mean of its divisors is an integer number (813920562).

Almost surely, 2^21100103130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21100103130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26045457984).

21100103130 is an abundant number, since it is smaller than the sum of its proper divisors (30990812838).

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

21100103130 is a wasteful number, since it uses less digits than its factorization.

21100103130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139071.

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 21100103130 its reverse (3130100112), we get a palindrome (24230203242).

The spelling of 21100103130 in words is "twenty-one billion, one hundred million, one hundred three thousand, one hundred thirty".