1220221112 has 48 divisors (see below), whose sum is σ = 2524903920. Its totient is φ = 552421760.

The previous prime is 1220221111. The next prime is 1220221127. The reversal of 1220221112 is 2111220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220221111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 252188 + ... + 256980.

It is an arithmetic number, because the mean of its divisors is an integer number (52602165).

Almost surely, 2^1220221112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220221112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1262451960).

1220221112 is an abundant number, since it is smaller than the sum of its proper divisors (1304682808).

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

1220221112 is a wasteful number, since it uses less digits than its factorization.

1220221112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5084 (or 5069 counting only the distinct ones).

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

The square root of 1220221112 is about 34931.6634588163. The cubic root of 1220221112 is about 1068.5942794586.

Adding to 1220221112 its reverse (2111220221), we get a palindrome (3331441333).

The spelling of 1220221112 in words is "one billion, two hundred twenty million, two hundred twenty-one thousand, one hundred twelve".