1002222020 has 24 divisors (see below), whose sum is σ = 2177242200. Its totient is φ = 387064832.

The previous prime is 1002222019. The next prime is 1002222041. The reversal of 1002222020 is 202222001.

It can be written as a sum of positive squares in 4 ways, for example, as 23658496 + 978563524 = 4864^2 + 31282^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1002221992 and 1002222010.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 863405 + ... + 864564.

It is an arithmetic number, because the mean of its divisors is an integer number (90718425).

Almost surely, 2^1002222020 is an apocalyptic number.

1002222020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1002222020 is an abundant number, since it is smaller than the sum of its proper divisors (1175020180).

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

1002222020 is a wasteful number, since it uses less digits than its factorization.

1002222020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1728007 (or 1728005 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 1002222020 is about 31657.8903276892. The cubic root of 1002222020 is about 1000.7401254126.

Adding to 1002222020 its reverse (202222001), we get a palindrome (1204444021).

The spelling of 1002222020 in words is "one billion, two million, two hundred twenty-two thousand, twenty".