12220322021 has 8 divisors (see below), whose sum is σ = 12364070040. Its totient is φ = 12076717312.

The previous prime is 12220321961. The next prime is 12220322029. The reversal of 12220322021 is 12022302221.

It can be written as a sum of positive squares in 4 ways, for example, as 347822500 + 11872499521 = 18650^2 + 108961^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12220322021 - 2⁶ = 12220321957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220322029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140801 + ... + 210393.

It is an arithmetic number, because the mean of its divisors is an integer number (1545508755).

Almost surely, 2^12220322021 is an apocalyptic number.

It is an amenable number.

12220322021 is a deficient number, since it is larger than the sum of its proper divisors (143748019).

12220322021 is an equidigital number, since it uses as much as digits as its factorization.

12220322021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71655.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 12220322021 its reverse (12022302221), we get a palindrome (24242624242).

The spelling of 12220322021 in words is "twelve billion, two hundred twenty million, three hundred twenty-two thousand, twenty-one".