1220211244 has 48 divisors (see below), whose sum is σ = 2590539840. Its totient is φ = 490936320.

The previous prime is 1220211241. The next prime is 1220211247. The reversal of 1220211244 is 4421120221.

It is an interprime number because it is at equal distance from previous prime (1220211241) and next prime (1220211247).

It is not an unprimeable number, because it can be changed into a prime (1220211241) 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, 197352 + ... + 203440.

It is an arithmetic number, because the mean of its divisors is an integer number (53969580).

Almost surely, 2^1220211244 is an apocalyptic number.

1220211244 is a gapful number since it is divisible by the number (14) 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 1220211244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1295269920).

1220211244 is an abundant number, since it is smaller than the sum of its proper divisors (1370328596).

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

1220211244 is a wasteful number, since it uses less digits than its factorization.

1220211244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6538 (or 6536 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 1220211244 is about 34931.5222113208. The cubic root of 1220211244 is about 1068.5913988559.

Adding to 1220211244 its reverse (4421120221), we get a palindrome (5641331465).

The spelling of 1220211244 in words is "one billion, two hundred twenty million, two hundred eleven thousand, two hundred forty-four".