21010162841 has 2 divisors, whose sum is σ = 21010162842. Its totient is φ = 21010162840.

The previous prime is 21010162837. The next prime is 21010162897. The reversal of 21010162841 is 14826101012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19071610000 + 1938552841 = 138100^2 + 44029^2 .

It is a cyclic number.

It is not a de Polignac number, because 21010162841 - 2² = 21010162837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21010162841.

It is not a weakly prime, because it can be changed into another prime (21010162141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505081420 + 10505081421.

It is an arithmetic number, because the mean of its divisors is an integer number (10505081421).

Almost surely, 2^21010162841 is an apocalyptic number.

It is an amenable number.

21010162841 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010162841 is an equidigital number, since it uses as much as digits as its factorization.

21010162841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 26.

Adding to 21010162841 its reverse (14826101012), we get a palindrome (35836263853).

The spelling of 21010162841 in words is "twenty-one billion, ten million, one hundred sixty-two thousand, eight hundred forty-one".