1000220020000 has 120 divisors (see below), whose sum is σ = 2461534178796. Its totient is φ = 399950976000.

The previous prime is 1000220019991. The next prime is 1000220020013. The reversal of 1000220020000 is 200220001.

It is a happy number.

It can be written as a sum of positive squares in 10 ways, for example, as 282560286096 + 717659733904 = 531564^2 + 847148^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 74653302 + ... + 74666698.

Almost surely, 2^{1000220020000} is an apocalyptic number.

1000220020000 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 1000220020000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1230767089398).

1000220020000 is an abundant number, since it is smaller than the sum of its proper divisors (1461314158796).

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

1000220020000 is an equidigital number, since it uses as much as digits as its factorization.

1000220020000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17160 (or 17137 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

Adding to 1000220020000 its reverse (200220001), we get a palindrome (1000420240001).

The spelling of 1000220020000 in words is "one trillion, two hundred twenty million, twenty thousand".