3600212121 has 24 divisors (see below), whose sum is σ = 5725125120. Its totient is φ = 2161922400.

The previous prime is 3600212117. The next prime is 3600212137. The reversal of 3600212121 is 1212120063.

3600212121 is a `hidden beast` number, since 3 + 600 + 21 + 21 + 21 = 666.

3600212121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3600212121 - 2² = 3600212117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3600212094 and 3600212103.

It is not an unprimeable number, because it can be changed into a prime (3600212191) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 156025 + ... + 177606.

It is an arithmetic number, because the mean of its divisors is an integer number (238546880).

Almost surely, 2^3600212121 is an apocalyptic number.

It is an amenable number.

3600212121 is a deficient number, since it is larger than the sum of its proper divisors (2124912999).

3600212121 is a wasteful number, since it uses less digits than its factorization.

3600212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333757 (or 333754 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 3600212121 is about 60001.7676489618. The cubic root of 3600212121 is about 1532.6489661076.

Adding to 3600212121 its reverse (1212120063), we get a palindrome (4812332184).

The spelling of 3600212121 in words is "three billion, six hundred million, two hundred twelve thousand, one hundred twenty-one".