2100100021103 has 32 divisors (see below), whose sum is σ = 2639929190400. Its totient is φ = 1628932806144.

The previous prime is 2100100021099. The next prime is 2100100021207. The reversal of 2100100021103 is 3011200010012.

It is not a de Polignac number, because 2100100021103 - 2² = 2100100021099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100100021003) 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 31 ways as a sum of consecutive naturals, for example, 448325 + ... + 2097902.

It is an arithmetic number, because the mean of its divisors is an integer number (82497787200).

Almost surely, 2^{2100100021103} is an apocalyptic number.

2100100021103 is a deficient number, since it is larger than the sum of its proper divisors (539829169297).

2100100021103 is a wasteful number, since it uses less digits than its factorization.

2100100021103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2546519.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 2100100021103 its reverse (3011200010012), we get a palindrome (5111300031115).

The spelling of 2100100021103 in words is "two trillion, one hundred billion, one hundred million, twenty-one thousand, one hundred three".