1002013221220 has 48 divisors (see below), whose sum is σ = 2295760678848. Its totient is φ = 364330431360.

The previous prime is 1002013221211. The next prime is 1002013221239. The reversal of 1002013221220 is 221223102001.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1002013221194 and 1002013221203.

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 15 ways as a sum of consecutive naturals, for example, 1920454 + ... + 2385826.

It is an arithmetic number, because the mean of its divisors is an integer number (47828347476).

Almost surely, 2^{1002013221220} is an apocalyptic number.

1002013221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1002013221220 is an abundant number, since it is smaller than the sum of its proper divisors (1293747457628).

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

1002013221220 is a wasteful number, since it uses less digits than its factorization.

1002013221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475180 (or 475178 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 1002013221220 its reverse (221223102001), we get a palindrome (1223236323221).

The spelling of 1002013221220 in words is "one trillion, two billion, thirteen million, two hundred twenty-one thousand, two hundred twenty".