2121423223 has 2 divisors, whose sum is σ = 2121423224. Its totient is φ = 2121423222.

The previous prime is 2121423221. The next prime is 2121423247. The reversal of 2121423223 is 3223241212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121423223 - 2¹ = 2121423221 is a prime.

Together with 2121423221, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 2121423194 and 2121423203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121423221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060711611 + 1060711612.

It is an arithmetic number, because the mean of its divisors is an integer number (1060711612).

Almost surely, 2^2121423223 is an apocalyptic number.

2121423223 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121423223 is an equidigital number, since it uses as much as digits as its factorization.

2121423223 is an evil number, because the sum of its binary digits is even.

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

The square root of 2121423223 is about 46058.9103540238. The cubic root of 2121423223 is about 1284.9190646839.

Adding to 2121423223 its reverse (3223241212), we get a palindrome (5344664435).

The spelling of 2121423223 in words is "two billion, one hundred twenty-one million, four hundred twenty-three thousand, two hundred twenty-three".