1223121112 has 32 divisors (see below), whose sum is σ = 2320718400. Its totient is φ = 604283904.

The previous prime is 1223121043. The next prime is 1223121127. The reversal of 1223121112 is 2111213221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 855214 + ... + 856642.

It is an arithmetic number, because the mean of its divisors is an integer number (72522450).

Almost surely, 2^1223121112 is an apocalyptic number.

It is an amenable number.

1223121112 is a deficient number, since it is larger than the sum of its proper divisors (1097597288).

1223121112 is a wasteful number, since it uses less digits than its factorization.

1223121112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2635 (or 2631 counting only the distinct ones).

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

The square root of 1223121112 is about 34973.1484427696. The cubic root of 1223121112 is about 1069.4401566607.

Adding to 1223121112 its reverse (2111213221), we get a palindrome (3334334333).

The spelling of 1223121112 in words is "one billion, two hundred twenty-three million, one hundred twenty-one thousand, one hundred twelve".