1220113244 has 12 divisors (see below), whose sum is σ = 2440226544. Its totient is φ = 522905664.

The previous prime is 1220113243. The next prime is 1220113289. The reversal of 1220113244 is 4423110221.

1220113244 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220113243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21787709 + ... + 21787764.

It is an arithmetic number, because the mean of its divisors is an integer number (203352212).

Almost surely, 2^1220113244 is an apocalyptic number.

1220113244 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1220113244 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1220113244 is a wasteful number, since it uses less digits than its factorization.

1220113244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43575484 (or 43575482 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1220113244 is about 34930.1194386736. The cubic root of 1220113244 is about 1068.5627904868.

Adding to 1220113244 its reverse (4423110221), we get a palindrome (5643223465).

The spelling of 1220113244 in words is "one billion, two hundred twenty million, one hundred thirteen thousand, two hundred forty-four".