1223211211 has 4 divisors (see below), whose sum is σ = 1235087152. Its totient is φ = 1211335272.

The previous prime is 1223211193. The next prime is 1223211233. The reversal of 1223211211 is 1121123221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1121123221 = 12511 ⋅89611.

It is a cyclic number.

It is not a de Polignac number, because 1223211211 - 2¹⁷ = 1223080139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1223211281) 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, 5937816 + ... + 5938021.

It is an arithmetic number, because the mean of its divisors is an integer number (308771788).

Almost surely, 2^1223211211 is an apocalyptic number.

1223211211 is a deficient number, since it is larger than the sum of its proper divisors (11875941).

1223211211 is a wasteful number, since it uses less digits than its factorization.

1223211211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11875940.

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

The square root of 1223211211 is about 34974.4365358472. The cubic root of 1223211211 is about 1069.4664154730.

Adding to 1223211211 its reverse (1121123221), we get a palindrome (2344334432).

The spelling of 1223211211 in words is "one billion, two hundred twenty-three million, two hundred eleven thousand, two hundred eleven".