8021232021 has 16 divisors (see below), whose sum is σ = 11675847168. Its totient is φ = 4857769200.

The previous prime is 8021232013. The next prime is 8021232031. The reversal of 8021232021 is 1202321208.

It is a happy number.

It is not a de Polignac number, because 8021232021 - 2³ = 8021232013 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8021232031) by changing a digit.

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, 43795 + ... + 134016.

It is an arithmetic number, because the mean of its divisors is an integer number (729740448).

Almost surely, 2^8021232021 is an apocalyptic number.

It is an amenable number.

8021232021 is a deficient number, since it is larger than the sum of its proper divisors (3654615147).

8021232021 is a wasteful number, since it uses less digits than its factorization.

8021232021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179192.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 8021232021 is about 89561.3310586662. The cubic root of 8021232021 is about 2001.7677721139.

Adding to 8021232021 its reverse (1202321208), we get a palindrome (9223553229).

It can be divided in two parts, 8021 and 232021, that added together give a palindrome (240042).

The spelling of 8021232021 in words is "eight billion, twenty-one million, two hundred thirty-two thousand, twenty-one".