1020002220 has 84 divisors (see below), whose sum is σ = 3211583760. Its totient is φ = 271996704.

The previous prime is 1020002219. The next prime is 1020002233. The reversal of 1020002220 is 222000201.

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

1020002220 is a modest number, since divided by 2220 gives 1020 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 20400 + ... + 49559.

It is an arithmetic number, because the mean of its divisors is an integer number (38233140).

Almost surely, 2^1020002220 is an apocalyptic number.

1020002220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020002220 is an abundant number, since it is smaller than the sum of its proper divisors (2191581540).

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

1020002220 is an equidigital number, since it uses as much as digits as its factorization.

1020002220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69986 (or 69969 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 1020002220 is about 31937.4736007719. The cubic root of 1020002220 is about 1006.6234398545.

Adding to 1020002220 its reverse (222000201), we get a palindrome (1242002421).

The spelling of 1020002220 in words is "one billion, twenty million, two thousand, two hundred twenty".