2100012123 has 16 divisors (see below), whose sum is σ = 3119556096. Its totient is φ = 1245654240.

The previous prime is 2100012121. The next prime is 2100012127. The reversal of 2100012123 is 3212100012.

It is not a de Polignac number, because 2100012123 - 2¹ = 2100012121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2100012099 and 2100012108.

It is not an unprimeable number, because it can be changed into a prime (2100012121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 675436 + ... + 678537.

It is an arithmetic number, because the mean of its divisors is an integer number (194972256).

Almost surely, 2^2100012123 is an apocalyptic number.

2100012123 is a deficient number, since it is larger than the sum of its proper divisors (1019543973).

2100012123 is a wasteful number, since it uses less digits than its factorization.

2100012123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1354034.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 2100012123 is about 45825.8892221417. The cubic root of 2100012123 is about 1280.5816291829.

Adding to 2100012123 its reverse (3212100012), we get a palindrome (5312112135).

The spelling of 2100012123 in words is "two billion, one hundred million, twelve thousand, one hundred twenty-three".