3520013021 has 4 divisors (see below), whose sum is σ = 4022872032. Its totient is φ = 3017154012.

The previous prime is 3520013009. The next prime is 3520013039. The reversal of 3520013021 is 1203100253.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3520013021 - 2¹⁰ = 3520011997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3520013041) 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, 251429495 + ... + 251429508.

It is an arithmetic number, because the mean of its divisors is an integer number (1005718008).

Almost surely, 2^3520013021 is an apocalyptic number.

It is an amenable number.

3520013021 is a deficient number, since it is larger than the sum of its proper divisors (502859011).

3520013021 is an equidigital number, since it uses as much as digits as its factorization.

3520013021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502859010.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 3520013021 is about 59329.6976311189. The cubic root of 3520013021 is about 1521.1828599933.

Adding to 3520013021 its reverse (1203100253), we get a palindrome (4723113274).

The spelling of 3520013021 in words is "three billion, five hundred twenty million, thirteen thousand, twenty-one".