21143141344441 has 2 divisors, whose sum is σ = 21143141344442. Its totient is φ = 21143141344440.

The previous prime is 21143141344433. The next prime is 21143141344459. The reversal of 21143141344441 is 14444314134112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16084110250000 + 5059031094441 = 4010500^2 + 2249229^2 .

It is a cyclic number.

It is not a de Polignac number, because 21143141344441 - 2³ = 21143141344433 is a prime.

It is a super-2 number, since 2×21143141344441² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21143141344441.

It is not a weakly prime, because it can be changed into another prime (21143141344421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10571570672220 + 10571570672221.

It is an arithmetic number, because the mean of its divisors is an integer number (10571570672221).

Almost surely, 2^{21143141344441} is an apocalyptic number.

It is an amenable number.

21143141344441 is a deficient number, since it is larger than the sum of its proper divisors (1).

21143141344441 is an equidigital number, since it uses as much as digits as its factorization.

21143141344441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 73728, while the sum is 37.

Adding to 21143141344441 its reverse (14444314134112), we get a palindrome (35587455478553).

The spelling of 21143141344441 in words is "twenty-one trillion, one hundred forty-three billion, one hundred forty-one million, three hundred forty-four thousand, four hundred forty-one".