21143144044331 has 4 divisors (see below), whose sum is σ = 21147651221064. Its totient is φ = 21138636867600.

The previous prime is 21143144044289. The next prime is 21143144044453. The reversal of 21143144044331 is 13344044134112.

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 21143144044331 - 2²⁶ = 21143076935467 is a prime.

It is a super-2 number, since 2×21143144044331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21143144044291 and 21143144044300.

It is not an unprimeable number, because it can be changed into a prime (21143144047331) 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, 2253581330 + ... + 2253590711.

It is an arithmetic number, because the mean of its divisors is an integer number (5286912805266).

Almost surely, 2^{21143144044331} is an apocalyptic number.

21143144044331 is a deficient number, since it is larger than the sum of its proper divisors (4507176733).

21143144044331 is an equidigital number, since it uses as much as digits as its factorization.

21143144044331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4507176732.

The product of its (nonzero) digits is 55296, while the sum is 35.

Adding to 21143144044331 its reverse (13344044134112), we get a palindrome (34487188178443).

The spelling of 21143144044331 in words is "twenty-one trillion, one hundred forty-three billion, one hundred forty-four million, forty-four thousand, three hundred thirty-one".