10001201320 has 256 divisors, whose sum is σ = 27596090880. Its totient is φ = 3216998400.

The previous prime is 10001201317. The next prime is 10001201351. The reversal of 10001201320 is 2310210001.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 10001201297 and 10001201306.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10493964 + ... + 10494916.

It is an arithmetic number, because the mean of its divisors is an integer number (107797230).

Almost surely, 2^10001201320 is an apocalyptic number.

10001201320 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 10001201320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13798045440).

10001201320 is an abundant number, since it is smaller than the sum of its proper divisors (17594889560).

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

10001201320 is a wasteful number, since it uses less digits than its factorization.

10001201320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1076 (or 1072 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 10001201320 its reverse (2310210001), we get a palindrome (12311411321).

The spelling of 10001201320 in words is "ten billion, one million, two hundred one thousand, three hundred twenty".