2100042103 has 2 divisors, whose sum is σ = 2100042104. Its totient is φ = 2100042102.

The previous prime is 2100042101. The next prime is 2100042107. The reversal of 2100042103 is 3012400012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2100042103 - 2¹ = 2100042101 is a prime.

Together with 2100042101, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2100042101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050021051 + 1050021052.

It is an arithmetic number, because the mean of its divisors is an integer number (1050021052).

Almost surely, 2^2100042103 is an apocalyptic number.

2100042103 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100042103 is an equidigital number, since it uses as much as digits as its factorization.

2100042103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 2100042103 is about 45826.2163286475. The cubic root of 2100042103 is about 1280.5877230612.

Adding to 2100042103 its reverse (3012400012), we get a palindrome (5112442115).

The spelling of 2100042103 in words is "two billion, one hundred million, forty-two thousand, one hundred three".