3608020121 has 4 divisors (see below), whose sum is σ = 3608234292. Its totient is φ = 3607805952.

The previous prime is 3608020111. The next prime is 3608020147. The reversal of 3608020121 is 1210208063.

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 2203269721 + 1404750400 = 46939^2 + 37480^2 .

It is a cyclic number.

It is not a de Polignac number, because 3608020121 - 2⁶ = 3608020057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3608020111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79436 + ... + 116301.

It is an arithmetic number, because the mean of its divisors is an integer number (902058573).

Almost surely, 2^3608020121 is an apocalyptic number.

It is an amenable number.

3608020121 is a deficient number, since it is larger than the sum of its proper divisors (214171).

3608020121 is a wasteful number, since it uses less digits than its factorization.

3608020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214170.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 3608020121 is about 60066.7971594957. The cubic root of 3608020121 is about 1533.7561492403.

Adding to 3608020121 its reverse (1210208063), we get a palindrome (4818228184).

The spelling of 3608020121 in words is "three billion, six hundred eight million, twenty thousand, one hundred twenty-one".