1000221120 has 84 divisors (see below), whose sum is σ = 3440353800. Its totient is φ = 266724864.

The previous prime is 1000221109. The next prime is 1000221137. The reversal of 1000221120 is 211220001.

1000221120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 170770 + ... + 176529.

Almost surely, 2^1000221120 is an apocalyptic number.

1000221120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000221120 is an abundant number, since it is smaller than the sum of its proper divisors (2440132680).

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

1000221120 is a wasteful number, since it uses less digits than its factorization.

1000221120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347322 (or 347309 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1000221120 is about 31626.2726226155. The cubic root of 1000221120 is about 1000.0737012347.

Adding to 1000221120 its reverse (211220001), we get a palindrome (1211441121).

The spelling of 1000221120 in words is "one billion, two hundred twenty-one thousand, one hundred twenty".