1222211120 has 80 divisors (see below), whose sum is σ = 3068345280. Its totient is φ = 450081792.

The previous prime is 1222211093. The next prime is 1222211129. The reversal of 1222211120 is 211122221.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 1222211095 and 1222211104.

It is not an unprimeable number, because it can be changed into a prime (1222211129) 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, 455222 + ... + 457898.

It is an arithmetic number, because the mean of its divisors is an integer number (38354316).

Almost surely, 2^1222211120 is an apocalyptic number.

1222211120 is a gapful number since it is divisible by the number (10) 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 1222211120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1534172640).

1222211120 is an abundant number, since it is smaller than the sum of its proper divisors (1846134160).

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

1222211120 is a wasteful number, since it uses less digits than its factorization.

1222211120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3142 (or 3136 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1222211120 is about 34960.1361553413. The cubic root of 1222211120 is about 1069.1748726471.

Adding to 1222211120 its reverse (211122221), we get a palindrome (1433333341).

The spelling of 1222211120 in words is "one billion, two hundred twenty-two million, two hundred eleven thousand, one hundred twenty".