36521544121 has 2 divisors, whose sum is σ = 36521544122. Its totient is φ = 36521544120.

The previous prime is 36521544119. The next prime is 36521544149. The reversal of 36521544121 is 12144512563.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34752416400 + 1769127721 = 186420^2 + 42061^2 .

It is an emirp because it is prime and its reverse (12144512563) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36521544121 - 2¹ = 36521544119 is a prime.

Together with 36521544119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (36521544421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18260772060 + 18260772061.

It is an arithmetic number, because the mean of its divisors is an integer number (18260772061).

Almost surely, 2^36521544121 is an apocalyptic number.

It is an amenable number.

36521544121 is a deficient number, since it is larger than the sum of its proper divisors (1).

36521544121 is an equidigital number, since it uses as much as digits as its factorization.

36521544121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28800, while the sum is 34.

The spelling of 36521544121 in words is "thirty-six billion, five hundred twenty-one million, five hundred forty-four thousand, one hundred twenty-one".