3215665121 has 8 divisors (see below), whose sum is σ = 3365441664. Its totient is φ = 3066719040.

The previous prime is 3215665097. The next prime is 3215665147. The reversal of 3215665121 is 1215665123.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3215665121 - 2³⁰ = 2141923297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3215665021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199685 + ... + 215186.

It is an arithmetic number, because the mean of its divisors is an integer number (420680208).

Almost surely, 2^3215665121 is an apocalyptic number.

It is an amenable number.

3215665121 is a deficient number, since it is larger than the sum of its proper divisors (149776543).

3215665121 is a wasteful number, since it uses less digits than its factorization.

3215665121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415231.

The product of its digits is 10800, while the sum is 32.

The square root of 3215665121 is about 56706.8348702341. The cubic root of 3215665121 is about 1476.0133029123.

The spelling of 3215665121 in words is "three billion, two hundred fifteen million, six hundred sixty-five thousand, one hundred twenty-one".