41000000021 has 2 divisors, whose sum is σ = 41000000022. Its totient is φ = 41000000020.

The previous prime is 40999999903. The next prime is 41000000051. The reversal of 41000000021 is 12000000014.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38093280625 + 2906719396 = 195175^2 + 53914^2 .

It is a cyclic number.

It is not a de Polignac number, because 41000000021 - 2¹⁴ = 40999983637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40999999945 and 41000000008.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41000000051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20500000010 + 20500000011.

It is an arithmetic number, because the mean of its divisors is an integer number (20500000011).

Almost surely, 2^41000000021 is an apocalyptic number.

It is an amenable number.

41000000021 is a deficient number, since it is larger than the sum of its proper divisors (1).

41000000021 is an equidigital number, since it uses as much as digits as its factorization.

41000000021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 41000000021 its reverse (12000000014), we get a palindrome (53000000035).

The spelling of 41000000021 in words is "forty-one billion, twenty-one", and thus it is an aban number and an uban number.