12200122021 has 4 divisors (see below), whose sum is σ = 12213514944. Its totient is φ = 12186729100.

The previous prime is 12200122019. The next prime is 12200122049. The reversal of 12200122021 is 12022100221.

It is a happy number.

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 12200122021 - 2¹ = 12200122019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12200121992 and 12200122010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12200122321) 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 3 ways as a sum of consecutive naturals, for example, 6695095 + ... + 6696916.

It is an arithmetic number, because the mean of its divisors is an integer number (3053378736).

Almost surely, 2^12200122021 is an apocalyptic number.

It is an amenable number.

12200122021 is a deficient number, since it is larger than the sum of its proper divisors (13392923).

12200122021 is an equidigital number, since it uses as much as digits as its factorization.

12200122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13392922.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 12200122021 its reverse (12022100221), we get a palindrome (24222222242).

The spelling of 12200122021 in words is "twelve billion, two hundred million, one hundred twenty-two thousand, twenty-one".