1336660121 has 4 divisors (see below), whose sum is σ = 1358572644. Its totient is φ = 1314747600.

The previous prime is 1336660109. The next prime is 1336660123. The reversal of 1336660121 is 1210666331.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 550418521 + 786241600 = 23461^2 + 28040^2 .

It is a cyclic number.

It is not a de Polignac number, because 1336660121 - 2⁶ = 1336660057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1336660123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10956170 + ... + 10956291.

It is an arithmetic number, because the mean of its divisors is an integer number (339643161).

Almost surely, 2^1336660121 is an apocalyptic number.

It is an amenable number.

1336660121 is a deficient number, since it is larger than the sum of its proper divisors (21912523).

1336660121 is an equidigital number, since it uses as much as digits as its factorization.

1336660121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21912522.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 1336660121 is about 36560.3627033431. The cubic root of 1336660121 is about 1101.5570569197.

The spelling of 1336660121 in words is "one billion, three hundred thirty-six million, six hundred sixty thousand, one hundred twenty-one".