2129210423 has 2 divisors, whose sum is σ = 2129210424. Its totient is φ = 2129210422.

The previous prime is 2129210389. The next prime is 2129210437. The reversal of 2129210423 is 3240129212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2129210423 - 2¹⁰ = 2129209399 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2129210392 and 2129210401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2129210443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064605211 + 1064605212.

It is an arithmetic number, because the mean of its divisors is an integer number (1064605212).

Almost surely, 2^2129210423 is an apocalyptic number.

2129210423 is a deficient number, since it is larger than the sum of its proper divisors (1).

2129210423 is an equidigital number, since it uses as much as digits as its factorization.

2129210423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 2129210423 is about 46143.3681367106. The cubic root of 2129210423 is about 1286.4893475459.

Adding to 2129210423 its reverse (3240129212), we get a palindrome (5369339635).

The spelling of 2129210423 in words is "two billion, one hundred twenty-nine million, two hundred ten thousand, four hundred twenty-three".