2121043423 has 2 divisors, whose sum is σ = 2121043424. Its totient is φ = 2121043422.

The previous prime is 2121043409. The next prime is 2121043427. The reversal of 2121043423 is 3243401212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2121043423 - 2⁵ = 2121043391 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2121043394 and 2121043403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121043427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060521711 + 1060521712.

It is an arithmetic number, because the mean of its divisors is an integer number (1060521712).

Almost surely, 2^2121043423 is an apocalyptic number.

2121043423 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121043423 is an equidigital number, since it uses as much as digits as its factorization.

2121043423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 2121043423 is about 46054.7871887386. The cubic root of 2121043423 is about 1284.8423800976.

Adding to 2121043423 its reverse (3243401212), we get a palindrome (5364444635).

The spelling of 2121043423 in words is "two billion, one hundred twenty-one million, forty-three thousand, four hundred twenty-three".