3521000120 has 64 divisors (see below), whose sum is σ = 8662883040. Its totient is φ = 1277337600.

The previous prime is 3521000117. The next prime is 3521000137. The reversal of 3521000120 is 210001253.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 3521000095 and 3521000104.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 181280 + ... + 199760.

Almost surely, 2^3521000120 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3521000120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4331441520).

3521000120 is an abundant number, since it is smaller than the sum of its proper divisors (5141882920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3521000120 is a wasteful number, since it uses less digits than its factorization.

3521000120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18936 (or 18932 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 3521000120 is about 59338.0158077434. The cubic root of 3521000120 is about 1521.3250391779.

Adding to 3521000120 its reverse (210001253), we get a palindrome (3731001373).

The spelling of 3521000120 in words is "three billion, five hundred twenty-one million, one hundred twenty", and thus it is an aban number.