1223311120 has 40 divisors (see below), whose sum is σ = 2967863616. Its totient is φ = 468048768.

The previous prime is 1223311087. The next prime is 1223311139. The reversal of 1223311120 is 211133221.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 1223311094 and 1223311103.

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, 330582 + ... + 334261.

Almost surely, 2^1223311120 is an apocalyptic number.

1223311120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223311120 is an abundant number, since it is smaller than the sum of its proper divisors (1744552496).

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

1223311120 is a wasteful number, since it uses less digits than its factorization.

1223311120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664879 (or 664873 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1223311120 is about 34975.8648213307. The cubic root of 1223311120 is about 1069.4955318431.

Adding to 1223311120 its reverse (211133221), we get a palindrome (1434444341).

The spelling of 1223311120 in words is "one billion, two hundred twenty-three million, three hundred eleven thousand, one hundred twenty".