2130100123 has 2 divisors, whose sum is σ = 2130100124. Its totient is φ = 2130100122.

The previous prime is 2130100121. The next prime is 2130100139. The reversal of 2130100123 is 3210010312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2130100123 - 2¹ = 2130100121 is a prime.

Together with 2130100121, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2130100121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065050061 + 1065050062.

It is an arithmetic number, because the mean of its divisors is an integer number (1065050062).

Almost surely, 2^2130100123 is an apocalyptic number.

2130100123 is a deficient number, since it is larger than the sum of its proper divisors (1).

2130100123 is an equidigital number, since it uses as much as digits as its factorization.

2130100123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 2130100123 is about 46153.0077351412. The cubic root of 2130100123 is about 1286.6685110163.

Adding to 2130100123 its reverse (3210010312), we get a palindrome (5340110435).

The spelling of 2130100123 in words is "two billion, one hundred thirty million, one hundred thousand, one hundred twenty-three".