2121021223 has 2 divisors, whose sum is σ = 2121021224. Its totient is φ = 2121021222.

The previous prime is 2121021197. The next prime is 2121021233. The reversal of 2121021223 is 3221201212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2121021223 - 2¹³ = 2121013031 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2121021197 and 2121021206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121021233) 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, 1060510611 + 1060510612.

It is an arithmetic number, because the mean of its divisors is an integer number (1060510612).

Almost surely, 2^2121021223 is an apocalyptic number.

2121021223 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121021223 is an equidigital number, since it uses as much as digits as its factorization.

2121021223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2121021223 is about 46054.5461708179. The cubic root of 2121021223 is about 1284.8378974611.

Adding to 2121021223 its reverse (3221201212), we get a palindrome (5342222435).

The spelling of 2121021223 in words is "two billion, one hundred twenty-one million, twenty-one thousand, two hundred twenty-three".