2122123211 has 4 divisors (see below), whose sum is σ = 2285363472. Its totient is φ = 1958882952.

The previous prime is 2122123207. The next prime is 2122123217. The reversal of 2122123211 is 1123212212.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2122123211 - 2² = 2122123207 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2122123211.

It is not an unprimeable number, because it can be changed into a prime (2122123217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81620111 + ... + 81620136.

It is an arithmetic number, because the mean of its divisors is an integer number (571340868).

Almost surely, 2^2122123211 is an apocalyptic number.

2122123211 is a deficient number, since it is larger than the sum of its proper divisors (163240261).

2122123211 is a wasteful number, since it uses less digits than its factorization.

2122123211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163240260.

The product of its digits is 96, while the sum is 17.

The square root of 2122123211 is about 46066.5085609926. The cubic root of 2122123211 is about 1285.0603737525.

Adding to 2122123211 its reverse (1123212212), we get a palindrome (3245335423).

The spelling of 2122123211 in words is "two billion, one hundred twenty-two million, one hundred twenty-three thousand, two hundred eleven".