1220661150 has 48 divisors (see below), whose sum is σ = 3035494704. Its totient is φ = 324622080.

The previous prime is 1220661133. The next prime is 1220661151. The reversal of 1220661150 is 511660221.

It is a self number, because there is not a number n which added to its sum of digits gives 1220661150.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220661151) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45042 + ... + 66858.

It is an arithmetic number, because the mean of its divisors is an integer number (63239473).

Almost surely, 2^1220661150 is an apocalyptic number.

1220661150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220661150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1517747352).

1220661150 is an abundant number, since it is smaller than the sum of its proper divisors (1814833554).

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

1220661150 is a wasteful number, since it uses less digits than its factorization.

1220661150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22205 (or 22200 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 1220661150 is about 34937.9614459688. The cubic root of 1220661150 is about 1068.7227167208.

The spelling of 1220661150 in words is "one billion, two hundred twenty million, six hundred sixty-one thousand, one hundred fifty".