2120813223 has 16 divisors (see below), whose sum is σ = 3031994880. Its totient is φ = 1313859456.

The previous prime is 2120813221. The next prime is 2120813237. The reversal of 2120813223 is 3223180212.

It is a happy number.

It is not a de Polignac number, because 2120813223 - 2¹ = 2120813221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2120813193 and 2120813202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120813221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259165 + ... + 267222.

It is an arithmetic number, because the mean of its divisors is an integer number (189499680).

Almost surely, 2^2120813223 is an apocalyptic number.

2120813223 is a deficient number, since it is larger than the sum of its proper divisors (911181657).

2120813223 is a wasteful number, since it uses less digits than its factorization.

2120813223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526486.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 2120813223 is about 46052.2879236200. The cubic root of 2120813223 is about 1284.7958964639.

Adding to 2120813223 its reverse (3223180212), we get a palindrome (5343993435).

The spelling of 2120813223 in words is "two billion, one hundred twenty million, eight hundred thirteen thousand, two hundred twenty-three".