2100111123 has 8 divisors (see below), whose sum is σ = 3054707136. Its totient is φ = 1272794600.

The previous prime is 2100111119. The next prime is 2100111127. The reversal of 2100111123 is 3211110012.

It is an interprime number because it is at equal distance from previous prime (2100111119) and next prime (2100111127).

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

It is not a de Polignac number, because 2100111123 - 2² = 2100111119 is a prime.

It is a super-2 number, since 2×2100111123² = 8820933457896642258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2100111099 and 2100111108.

It is not an unprimeable number, because it can be changed into a prime (2100111127) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 31819833 + ... + 31819898.

It is an arithmetic number, because the mean of its divisors is an integer number (381838392).

Almost surely, 2^2100111123 is an apocalyptic number.

2100111123 is a deficient number, since it is larger than the sum of its proper divisors (954596013).

2100111123 is a wasteful number, since it uses less digits than its factorization.

2100111123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63639745.

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

The square root of 2100111123 is about 45826.9693848502. The cubic root of 2100111123 is about 1280.6017521762.

Adding to 2100111123 its reverse (3211110012), we get a palindrome (5311221135).

The spelling of 2100111123 in words is "two billion, one hundred million, one hundred eleven thousand, one hundred twenty-three".