21131120013143 has 6 divisors (see below), whose sum is σ = 24581098790856. Its totient is φ = 18112388582652.

The previous prime is 21131120013103. The next prime is 21131120013151. The reversal of 21131120013143 is 34131002113112.

It is a de Polignac number, because none of the positive numbers 2^k-21131120013143 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 (21131120013103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 215623673555 + ... + 215623673652.

It is an arithmetic number, because the mean of its divisors is an integer number (4096849798476).

Almost surely, 2^{21131120013143} is an apocalyptic number.

21131120013143 is a deficient number, since it is larger than the sum of its proper divisors (3449978777713).

21131120013143 is an equidigital number, since it uses as much as digits as its factorization.

21131120013143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431247347221 (or 431247347214 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 21131120013143 its reverse (34131002113112), we get a palindrome (55262122126255).

The spelling of 21131120013143 in words is "twenty-one trillion, one hundred thirty-one billion, one hundred twenty million, thirteen thousand, one hundred forty-three".