1223111296 has 128 divisors (see below), whose sum is σ = 2802470400. Its totient is φ = 526310400.

The previous prime is 1223111269. The next prime is 1223111297. The reversal of 1223111296 is 6921113221.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (1223111297) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5796631 + ... + 5796841.

It is an arithmetic number, because the mean of its divisors is an integer number (21894300).

Almost surely, 2^1223111296 is an apocalyptic number.

1223111296 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1223111296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1401235200).

1223111296 is an abundant number, since it is smaller than the sum of its proper divisors (1579359104).

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

1223111296 is a wasteful number, since it uses less digits than its factorization.

1223111296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438 (or 426 counting only the distinct ones).

The product of its digits is 1296, while the sum is 28.

The square root of 1223111296 is about 34973.0081062525. The cubic root of 1223111296 is about 1069.4372957686.

The spelling of 1223111296 in words is "one billion, two hundred twenty-three million, one hundred eleven thousand, two hundred ninety-six".