21044041131443 has 16 divisors (see below), whose sum is σ = 23058792941184. Its totient is φ = 19046377632960.

The previous prime is 21044041131437. The next prime is 21044041131559. The reversal of 21044041131443 is 34413114044012.

It is a cyclic number.

It is not a de Polignac number, because 21044041131443 - 2²⁸ = 21043772695987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21044041031443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 741605 + ... + 6529782.

It is an arithmetic number, because the mean of its divisors is an integer number (1441174558824).

Almost surely, 2^{21044041131443} is an apocalyptic number.

21044041131443 is a deficient number, since it is larger than the sum of its proper divisors (2014751809741).

21044041131443 is a wasteful number, since it uses less digits than its factorization.

21044041131443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7272562.

The product of its (nonzero) digits is 18432, while the sum is 32.

Adding to 21044041131443 its reverse (34413114044012), we get a palindrome (55457155175455).

The spelling of 21044041131443 in words is "twenty-one trillion, forty-four billion, forty-one million, one hundred thirty-one thousand, four hundred forty-three".