20010120112001 has 4 divisors (see below), whose sum is σ = 20010215629572. Its totient is φ = 20010024594432.

The previous prime is 20010120111979. The next prime is 20010120112007. The reversal of 20010120112001 is 10021102101002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7247935455601 + 12762184656400 = 2692199^2 + 3572420^2 .

It is a cyclic number.

It is not a de Polignac number, because 20010120112001 - 2⁶ = 20010120111937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20010120112007) 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, 47443856 + ... + 47863761.

It is an arithmetic number, because the mean of its divisors is an integer number (5002553907393).

Almost surely, 2^{20010120112001} is an apocalyptic number.

It is an amenable number.

20010120112001 is a deficient number, since it is larger than the sum of its proper divisors (95517571).

20010120112001 is an equidigital number, since it uses as much as digits as its factorization.

20010120112001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95517570.

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

Adding to 20010120112001 its reverse (10021102101002), we get a palindrome (30031222213003).

The spelling of 20010120112001 in words is "twenty trillion, ten billion, one hundred twenty million, one hundred twelve thousand, one".