41043340021 has 2 divisors, whose sum is σ = 41043340022. Its totient is φ = 41043340020.

The previous prime is 41043340007. The next prime is 41043340109. The reversal of 41043340021 is 12004334014.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36996599025 + 4046740996 = 192345^2 + 63614^2 .

It is a cyclic number.

It is not a de Polignac number, because 41043340021 - 2¹⁹ = 41042815733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 41043339974 and 41043340001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41043344021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20521670010 + 20521670011.

It is an arithmetic number, because the mean of its divisors is an integer number (20521670011).

Almost surely, 2^41043340021 is an apocalyptic number.

It is an amenable number.

41043340021 is a deficient number, since it is larger than the sum of its proper divisors (1).

41043340021 is an equidigital number, since it uses as much as digits as its factorization.

41043340021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 41043340021 its reverse (12004334014), we get a palindrome (53047674035).

The spelling of 41043340021 in words is "forty-one billion, forty-three million, three hundred forty thousand, twenty-one".