41420135821 has 2 divisors, whose sum is σ = 41420135822. Its totient is φ = 41420135820.

The previous prime is 41420135819. The next prime is 41420135849. The reversal of 41420135821 is 12853102414.

41420135821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39011780196 + 2408355625 = 197514^2 + 49075^2 .

It is a cyclic number.

It is not a de Polignac number, because 41420135821 - 2¹ = 41420135819 is a prime.

Together with 41420135819, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41420135851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20710067910 + 20710067911.

It is an arithmetic number, because the mean of its divisors is an integer number (20710067911).

Almost surely, 2^41420135821 is an apocalyptic number.

It is an amenable number.

41420135821 is a deficient number, since it is larger than the sum of its proper divisors (1).

41420135821 is an equidigital number, since it uses as much as digits as its factorization.

41420135821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 31.

It can be divided in two parts, 41420 and 135821, that added together give a square (177241 = 421²).

The spelling of 41420135821 in words is "forty-one billion, four hundred twenty million, one hundred thirty-five thousand, eight hundred twenty-one".