12030022021 has 4 divisors (see below), whose sum is σ = 12030251500. Its totient is φ = 12029792544.

The previous prime is 12030022003. The next prime is 12030022049. The reversal of 12030022021 is 12022003021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1622961796 + 10407060225 = 40286^2 + 102015^2 .

It is a cyclic number.

It is not a de Polignac number, because 12030022021 - 2¹¹ = 12030019973 is a prime.

It is a super-3 number, since 3×12030022021³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12030021992 and 12030022010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12030022721) 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, 6835 + ... + 155263.

It is an arithmetic number, because the mean of its divisors is an integer number (3007562875).

Almost surely, 2^12030022021 is an apocalyptic number.

It is an amenable number.

12030022021 is a deficient number, since it is larger than the sum of its proper divisors (229479).

12030022021 is an equidigital number, since it uses as much as digits as its factorization.

12030022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229478.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 12030022021 its reverse (12022003021), we get a palindrome (24052025042).

The spelling of 12030022021 in words is "twelve billion, thirty million, twenty-two thousand, twenty-one".