1222111213 has 12 divisors (see below), whose sum is σ = 1260450048. Its totient is φ = 1184296680.

The previous prime is 1222111207. The next prime is 1222111273. The reversal of 1222111213 is 3121112221.

It is not a de Polignac number, because 1222111213 - 2²⁵ = 1188556781 is a prime.

It is a super-3 number, since 3×1222111213³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222111273) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 830068 + ... + 831538.

It is an arithmetic number, because the mean of its divisors is an integer number (105037504).

Almost surely, 2^1222111213 is an apocalyptic number.

It is an amenable number.

1222111213 is a deficient number, since it is larger than the sum of its proper divisors (38338835).

1222111213 is an equidigital number, since it uses as much as digits as its factorization.

1222111213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1792 (or 1653 counting only the distinct ones).

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

The square root of 1222111213 is about 34958.7072558469. The cubic root of 1222111213 is about 1069.1457393921.

Adding to 1222111213 its reverse (3121112221), we get a palindrome (4343223434).

The spelling of 1222111213 in words is "one billion, two hundred twenty-two million, one hundred eleven thousand, two hundred thirteen".