20001130203121 has 2 divisors, whose sum is σ = 20001130203122. Its totient is φ = 20001130203120.

The previous prime is 20001130203113. The next prime is 20001130203151. The reversal of 20001130203121 is 12130203110002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15898074843121 + 4103055360000 = 3987239^2 + 2025600^2 .

It is a cyclic number.

It is not a de Polignac number, because 20001130203121 - 2³ = 20001130203113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20001130203095 and 20001130203104.

It is not a weakly prime, because it can be changed into another prime (20001130203151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000565101560 + 10000565101561.

It is an arithmetic number, because the mean of its divisors is an integer number (10000565101561).

Almost surely, 2^{20001130203121} is an apocalyptic number.

It is an amenable number.

20001130203121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001130203121 is an equidigital number, since it uses as much as digits as its factorization.

20001130203121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20001130203121 its reverse (12130203110002), we get a palindrome (32131333313123).

The spelling of 20001130203121 in words is "twenty trillion, one billion, one hundred thirty million, two hundred three thousand, one hundred twenty-one".