10001220112001 has 4 divisors (see below), whose sum is σ = 10003392877872. Its totient is φ = 9999047346132.

The previous prime is 10001220111979. The next prime is 10001220112069. The reversal of 10001220112001 is 10021102210001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10001220112001 - 2²² = 10001215917697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10001220112801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1086376031 + ... + 1086385236.

It is an arithmetic number, because the mean of its divisors is an integer number (2500848219468).

Almost surely, 2^{10001220112001} is an apocalyptic number.

It is an amenable number.

10001220112001 is a deficient number, since it is larger than the sum of its proper divisors (2172765871).

10001220112001 is an equidigital number, since it uses as much as digits as its factorization.

10001220112001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2172765870.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 10001220112001 its reverse (10021102210001), we get a palindrome (20022322322002).

The spelling of 10001220112001 in words is "ten trillion, one billion, two hundred twenty million, one hundred twelve thousand, one".