2123212323 has 16 divisors (see below), whose sum is σ = 2982372480. Its totient is φ = 1339884864.

The previous prime is 2123212319. The next prime is 2123212337. The reversal of 2123212323 is 3232123212.

It is a happy number.

2123212323 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is not a de Polignac number, because 2123212323 - 2² = 2123212319 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 2123212323.

It is not an unprimeable number, because it can be changed into a prime (2123212313) 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, 58615 + ... + 87647.

It is an arithmetic number, because the mean of its divisors is an integer number (186398280).

Almost surely, 2^2123212323 is an apocalyptic number.

2123212323 is a deficient number, since it is larger than the sum of its proper divisors (859160157).

2123212323 is a wasteful number, since it uses less digits than its factorization.

2123212323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30338.

The product of its digits is 864, while the sum is 21.

The square root of 2123212323 is about 46078.3281272227. The cubic root of 2123212323 is about 1285.2801748941.

Adding to 2123212323 its reverse (3232123212), we get a palindrome (5355335535).

The spelling of 2123212323 in words is "two billion, one hundred twenty-three million, two hundred twelve thousand, three hundred twenty-three".