2111212213 has 4 divisors (see below), whose sum is σ = 2303140608. Its totient is φ = 1919283820.

The previous prime is 2111212211. The next prime is 2111212217. The reversal of 2111212213 is 3122121112.

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 2111212213 - 2¹ = 2111212211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111212211) 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 in 3 ways as a sum of consecutive naturals, for example, 95964181 + ... + 95964202.

It is an arithmetic number, because the mean of its divisors is an integer number (575785152).

Almost surely, 2^2111212213 is an apocalyptic number.

It is an amenable number.

2111212213 is a deficient number, since it is larger than the sum of its proper divisors (191928395).

2111212213 is a wasteful number, since it uses less digits than its factorization.

2111212213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191928394.

The product of its digits is 48, while the sum is 16.

The square root of 2111212213 is about 45947.9293657505. The cubic root of 2111212213 is about 1282.8541885584.

Adding to 2111212213 its reverse (3122121112), we get a palindrome (5233333325).

The spelling of 2111212213 in words is "two billion, one hundred eleven million, two hundred twelve thousand, two hundred thirteen".