41386612921 has 2 divisors, whose sum is σ = 41386612922. Its totient is φ = 41386612920.

The previous prime is 41386612909. The next prime is 41386612997. The reversal of 41386612921 is 12921668314.

41386612921 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., 37933405225 + 3453207696 = 194765^2 + 58764^2 .

It is a cyclic number.

It is not a de Polignac number, because 41386612921 - 2¹¹ = 41386610873 is a prime.

It is not a weakly prime, because it can be changed into another prime (41386682921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20693306460 + 20693306461.

It is an arithmetic number, because the mean of its divisors is an integer number (20693306461).

Almost surely, 2^41386612921 is an apocalyptic number.

It is an amenable number.

41386612921 is a deficient number, since it is larger than the sum of its proper divisors (1).

41386612921 is an equidigital number, since it uses as much as digits as its factorization.

41386612921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 43.

The spelling of 41386612921 in words is "forty-one billion, three hundred eighty-six million, six hundred twelve thousand, nine hundred twenty-one".