20001131113331 has 4 divisors (see below), whose sum is σ = 20378510945712. Its totient is φ = 19623751280952.

The previous prime is 20001131113307. The next prime is 20001131113429. The reversal of 20001131113331 is 13331113110002.

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

It is a cyclic number.

It is not a de Polignac number, because 20001131113331 - 2¹⁰ = 20001131112307 is a prime.

It is a super-2 number, since 2×20001131113331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001131113231) 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 in 3 ways as a sum of consecutive naturals, for example, 188689916111 + ... + 188689916216.

It is an arithmetic number, because the mean of its divisors is an integer number (5094627736428).

Almost surely, 2^{20001131113331} is an apocalyptic number.

20001131113331 is a deficient number, since it is larger than the sum of its proper divisors (377379832381).

20001131113331 is an equidigital number, since it uses as much as digits as its factorization.

20001131113331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377379832380.

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 20001131113331 its reverse (13331113110002), we get a palindrome (33332244223333).

The spelling of 20001131113331 in words is "twenty trillion, one billion, one hundred thirty-one million, one hundred thirteen thousand, three hundred thirty-one".