12022020021 has 32 divisors (see below), whose sum is σ = 17591592960. Its totient is φ = 7242435200.

The previous prime is 12022020013. The next prime is 12022020037. The reversal of 12022020021 is 12002022021.

It is not a de Polignac number, because 12022020021 - 2³ = 12022020013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12022019979 and 12022020006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12022020061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6001006 + ... + 6003008.

It is an arithmetic number, because the mean of its divisors is an integer number (549737280).

Almost surely, 2^12022020021 is an apocalyptic number.

12022020021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12022020021 is a deficient number, since it is larger than the sum of its proper divisors (5569572939).

12022020021 is a wasteful number, since it uses less digits than its factorization.

12022020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3017.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 12022020021 its reverse (12002022021), we get a palindrome (24024042042).

The spelling of 12022020021 in words is "twelve billion, twenty-two million, twenty thousand, twenty-one".