1001002203220 has 12 divisors (see below), whose sum is σ = 2102104626804. Its totient is φ = 400400881280.

The previous prime is 1001002203169. The next prime is 1001002203221. The reversal of 1001002203220 is 223022001001.

It can be written as a sum of positive squares in 2 ways, for example, as 537344709444 + 463657493776 = 733038^2 + 680924^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1001002203220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001002203221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25025055061 + ... + 25025055100.

It is an arithmetic number, because the mean of its divisors is an integer number (175175385567).

Almost surely, 2^{1001002203220} is an apocalyptic number.

1001002203220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001002203220 is an abundant number, since it is smaller than the sum of its proper divisors (1101102423584).

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

1001002203220 is a wasteful number, since it uses less digits than its factorization.

1001002203220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50050110170 (or 50050110168 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 1001002203220 its reverse (223022001001), we get a palindrome (1224024204221).

The spelling of 1001002203220 in words is "one trillion, one billion, two million, two hundred three thousand, two hundred twenty".