1001220200010 has 160 divisors (see below), whose sum is σ = 2752760138832. Its totient is φ = 261019100160.

The previous prime is 1001220199999. The next prime is 1001220200021. The reversal of 1001220200010 is 100020221001.

It is an interprime number because it is at equal distance from previous prime (1001220199999) and next prime (1001220200021).

It can be written as a sum of positive squares in 8 ways, for example, as 706472189361 + 294748010649 = 840519^2 + 542907^2 .

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1001220199965 and 1001220200001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 12021832 + ... + 12104828.

Almost surely, 2^{1001220200010} is an apocalyptic number.

1001220200010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1001220200010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1376380069416).

1001220200010 is an abundant number, since it is smaller than the sum of its proper divisors (1751539938822).

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

1001220200010 is a wasteful number, since it uses less digits than its factorization.

1001220200010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83350 (or 83341 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 1001220200010 its reverse (100020221001), we get a palindrome (1101240421011).

The spelling of 1001220200010 in words is "one trillion, one billion, two hundred twenty million, two hundred thousand, ten".