2123012213 has 4 divisors (see below), whose sum is σ = 2426299680. Its totient is φ = 1819724748.

The previous prime is 2123012201. The next prime is 2123012257. The reversal of 2123012213 is 3122103212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2123012213 - 2²⁰ = 2121963637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2123012191 and 2123012200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123012273) 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 3 ways as a sum of consecutive naturals, for example, 151643723 + ... + 151643736.

It is an arithmetic number, because the mean of its divisors is an integer number (606574920).

Almost surely, 2^2123012213 is an apocalyptic number.

It is an amenable number.

2123012213 is a deficient number, since it is larger than the sum of its proper divisors (303287467).

2123012213 is an equidigital number, since it uses as much as digits as its factorization.

2123012213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303287466.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2123012213 is about 46076.1566648088. The cubic root of 2123012213 is about 1285.2397949638.

Adding to 2123012213 its reverse (3122103212), we get a palindrome (5245115425).

Subtracting 2123012213 from its reverse (3122103212), we obtain a palindrome (999090999).

The spelling of 2123012213 in words is "two billion, one hundred twenty-three million, twelve thousand, two hundred thirteen".