1002212221220 has 96 divisors (see below), whose sum is σ = 2433625399296. Its totient is φ = 339584112000.

The previous prime is 1002212221189. The next prime is 1002212221243. The reversal of 1002212221220 is 221222122001.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7009445 + ... + 7150995.

It is an arithmetic number, because the mean of its divisors is an integer number (25350264576).

Almost surely, 2^{1002212221220} is an apocalyptic number.

1002212221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1002212221220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1216812699648).

1002212221220 is an abundant number, since it is smaller than the sum of its proper divisors (1431413178076).

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

1002212221220 is a wasteful number, since it uses less digits than its factorization.

1002212221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142161 (or 142159 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1002212221220 its reverse (221222122001), we get a palindrome (1223434343221).

The spelling of 1002212221220 in words is "one trillion, two billion, two hundred twelve million, two hundred twenty-one thousand, two hundred twenty".