3621235021 has 4 divisors (see below), whose sum is σ = 3625210944. Its totient is φ = 3617259100.

The previous prime is 3621234989. The next prime is 3621235027. The reversal of 3621235021 is 1205321263.

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 3621235021 - 2⁵ = 3621234989 is a prime.

It is a super-2 number, since 2×3621235021² = 26226686154633740882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3621235027) 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, 1986595 + ... + 1988416.

It is an arithmetic number, because the mean of its divisors is an integer number (906302736).

Almost surely, 2^3621235021 is an apocalyptic number.

It is an amenable number.

3621235021 is a deficient number, since it is larger than the sum of its proper divisors (3975923).

3621235021 is an equidigital number, since it uses as much as digits as its factorization.

3621235021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3975922.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 3621235021 is about 60176.6983225235. The cubic root of 3621235021 is about 1535.6264029456.

Adding to 3621235021 its reverse (1205321263), we get a palindrome (4826556284).

The spelling of 3621235021 in words is "three billion, six hundred twenty-one million, two hundred thirty-five thousand, twenty-one".