12022011221 has 8 divisors (see below), whose sum is σ = 13143252864. Its totient is φ = 10905491520.

The previous prime is 12022011191. The next prime is 12022011233. The reversal of 12022011221 is 12211022021.

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

It is a de Polignac number, because none of the positive numbers 2^k-12022011221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12022011196 and 12022011205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12022011271) 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, 1175156 + ... + 1185341.

It is an arithmetic number, because the mean of its divisors is an integer number (1642906608).

Almost surely, 2^12022011221 is an apocalyptic number.

12022011221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12022011221 is a deficient number, since it is larger than the sum of its proper divisors (1121241643).

12022011221 is a wasteful number, since it uses less digits than its factorization.

12022011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2360971.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12022011221 its reverse (12211022021), we get a palindrome (24233033242).

The spelling of 12022011221 in words is "twelve billion, twenty-two million, eleven thousand, two hundred twenty-one".