3521000121 has 16 divisors (see below), whose sum is σ = 4763132928. Its totient is φ = 2313133200.

The previous prime is 3521000117. The next prime is 3521000137. The reversal of 3521000121 is 1210001253.

It is not a de Polignac number, because 3521000121 - 2² = 3521000117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3521000121.

It is not an unprimeable number, because it can be changed into a prime (3521000191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 830076 + ... + 834306.

It is an arithmetic number, because the mean of its divisors is an integer number (297695808).

Almost surely, 2^3521000121 is an apocalyptic number.

It is an amenable number.

3521000121 is a deficient number, since it is larger than the sum of its proper divisors (1242132807).

3521000121 is a wasteful number, since it uses less digits than its factorization.

3521000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8212.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 3521000121 is about 59338.0158161697. The cubic root of 3521000121 is about 1521.3250393220.

Adding to 3521000121 its reverse (1210001253), we get a palindrome (4731001374).

The spelling of 3521000121 in words is "three billion, five hundred twenty-one million, one hundred twenty-one", and thus it is an aban number.