1222123112 has 24 divisors (see below), whose sum is σ = 2665601010. Its totient is φ = 523766880.

The previous prime is 1222123069. The next prime is 1222123117. The reversal of 1222123112 is 2113212221.

It can be written as a sum of positive squares in only one way, i.e., 744525796 + 477597316 = 27286^2 + 21854^2 .

It is not an unprimeable number, because it can be changed into a prime (1222123117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1558439 + ... + 1559222.

Almost surely, 2^1222123112 is an apocalyptic number.

It is an amenable number.

1222123112 is an abundant number, since it is smaller than the sum of its proper divisors (1443477898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1222123112 is a wasteful number, since it uses less digits than its factorization.

1222123112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3117681 (or 3117670 counting only the distinct ones).

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

The square root of 1222123112 is about 34958.8774419317. The cubic root of 1222123112 is about 1069.1492092683.

Adding to 1222123112 its reverse (2113212221), we get a palindrome (3335335333).

The spelling of 1222123112 in words is "one billion, two hundred twenty-two million, one hundred twenty-three thousand, one hundred twelve".