2100003123 has 8 divisors (see below), whose sum is σ = 2816771328. Its totient is φ = 1391618504.

The previous prime is 2100003121. The next prime is 2100003127. The reversal of 2100003123 is 3213000012.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2100003123 - 2¹ = 2100003121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2100003099 and 2100003108.

It is not an unprimeable number, because it can be changed into a prime (2100003121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2095311 + ... + 2096312.

It is an arithmetic number, because the mean of its divisors is an integer number (352096416).

Almost surely, 2^2100003123 is an apocalyptic number.

2100003123 is a deficient number, since it is larger than the sum of its proper divisors (716768205).

2100003123 is a wasteful number, since it uses less digits than its factorization.

2100003123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4191793.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 2100003123 is about 45825.7910242693. The cubic root of 2100003123 is about 1280.5797997886.

Adding to 2100003123 its reverse (3213000012), we get a palindrome (5313003135).

The spelling of 2100003123 in words is "two billion, one hundred million, three thousand, one hundred twenty-three".