1222111320 has 32 divisors (see below), whose sum is σ = 3666334320. Its totient is φ = 325896320.

The previous prime is 1222111273. The next prime is 1222111321. The reversal of 1222111320 is 231112221.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1222111320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222111321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5092011 + ... + 5092250.

Almost surely, 2^1222111320 is an apocalyptic number.

1222111320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222111320 is an abundant number, since it is smaller than the sum of its proper divisors (2444223000).

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

1222111320 is a wasteful number, since it uses less digits than its factorization.

1222111320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10184275 (or 10184271 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1222111320 is about 34958.7087862238. The cubic root of 1222111320 is about 1069.1457705945.

Adding to 1222111320 its reverse (231112221), we get a palindrome (1453223541).

Subtracting from 1222111320 its reverse (231112221), we obtain a palindrome (990999099).

The spelling of 1222111320 in words is "one billion, two hundred twenty-two million, one hundred eleven thousand, three hundred twenty".