20004311052101 has 4 divisors (see below), whose sum is σ = 20492221077804. Its totient is φ = 19516401026400.

The previous prime is 20004311052071. The next prime is 20004311052109. The reversal of 20004311052101 is 10125011340002.

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 6843450768001 + 13160860284100 = 2615999^2 + 3627790^2 .

It is a cyclic number.

It is not a de Polignac number, because 20004311052101 - 2³⁴ = 19987131182917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20004311052109) 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, 243955012790 + ... + 243955012871.

It is an arithmetic number, because the mean of its divisors is an integer number (5123055269451).

Almost surely, 2^{20004311052101} is an apocalyptic number.

It is an amenable number.

20004311052101 is a deficient number, since it is larger than the sum of its proper divisors (487910025703).

20004311052101 is an equidigital number, since it uses as much as digits as its factorization.

20004311052101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487910025702.

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 20004311052101 its reverse (10125011340002), we get a palindrome (30129322392103).

The spelling of 20004311052101 in words is "twenty trillion, four billion, three hundred eleven million, fifty-two thousand, one hundred one".