2123100043 has 2 divisors, whose sum is σ = 2123100044. Its totient is φ = 2123100042.

The previous prime is 2123100041. The next prime is 2123100047. The reversal of 2123100043 is 3400013212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2123100043 - 2¹ = 2123100041 is a prime.

Together with 2123100041, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2123100041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061550021 + 1061550022.

It is an arithmetic number, because the mean of its divisors is an integer number (1061550022).

Almost surely, 2^2123100043 is an apocalyptic number.

2123100043 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123100043 is an equidigital number, since it uses as much as digits as its factorization.

2123100043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 2123100043 is about 46077.1097509382. The cubic root of 2123100043 is about 1285.2575183749.

Adding to 2123100043 its reverse (3400013212), we get a palindrome (5523113255).

The spelling of 2123100043 in words is "two billion, one hundred twenty-three million, one hundred thousand, forty-three".