1000120220 has 24 divisors (see below), whose sum is σ = 2291185008. Its totient is φ = 363680000.

The previous prime is 1000120181. The next prime is 1000120243. The reversal of 1000120220 is 220210001.

It is a junction number, because it is equal to n+sod(n) for n = 1000120198 and 1000120207.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2272781 + ... + 2273220.

It is an arithmetic number, because the mean of its divisors is an integer number (95466042).

Almost surely, 2^1000120220 is an apocalyptic number.

1000120220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000120220 is an abundant number, since it is smaller than the sum of its proper divisors (1291064788).

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

1000120220 is a wasteful number, since it uses less digits than its factorization.

1000120220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4546021 (or 4546019 counting only the distinct ones).

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

The square root of 1000120220 is about 31624.6773896589. The cubic root of 1000120220 is about 1000.0400717276.

Adding to 1000120220 its reverse (220210001), we get a palindrome (1220330221).

The spelling of 1000120220 in words is "one billion, one hundred twenty thousand, two hundred twenty".