2101003123 has 12 divisors (see below), whose sum is σ = 2233584640. Its totient is φ = 1975888512.

The previous prime is 2101003081. The next prime is 2101003127. The reversal of 2101003123 is 3213001012.

It is not a de Polignac number, because 2101003123 - 2⁹ = 2101002611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2101003127) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 584590 + ... + 588172.

Almost surely, 2^2101003123 is an apocalyptic number.

2101003123 is a deficient number, since it is larger than the sum of its proper divisors (132581517).

2101003123 is a wasteful number, since it uses less digits than its factorization.

2101003123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5646 (or 5629 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 2101003123 is about 45836.7006120641. The cubic root of 2101003123 is about 1280.7830338653.

Adding to 2101003123 its reverse (3213001012), we get a palindrome (5314004135).

The spelling of 2101003123 in words is "two billion, one hundred one million, three thousand, one hundred twenty-three".