36121021 has 2 divisors, whose sum is σ = 36121022. Its totient is φ = 36121020.

The previous prime is 36121003. The next prime is 36121061. The reversal of 36121021 is 12012163.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31236921 + 4884100 = 5589^2 + 2210^2 .

It is a cyclic number.

It is not a de Polignac number, because 36121021 - 2⁹ = 36120509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 36120986 and 36121004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36121061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18060510 + 18060511.

It is an arithmetic number, because the mean of its divisors is an integer number (18060511).

Almost surely, 2^36121021 is an apocalyptic number.

It is an amenable number.

36121021 is a deficient number, since it is larger than the sum of its proper divisors (1).

36121021 is an equidigital number, since it uses as much as digits as its factorization.

36121021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 36121021 is about 6010.0766218077. The cubic root of 36121021 is about 330.5623134001.

Adding to 36121021 its reverse (12012163), we get a palindrome (48133184).

The spelling of 36121021 in words is "thirty-six million, one hundred twenty-one thousand, twenty-one".