12023122221 has 16 divisors (see below), whose sum is σ = 19431309120. Its totient is φ = 7286740560.

The previous prime is 12023122201. The next prime is 12023122249. The reversal of 12023122221 is 12222132021.

It is not a de Polignac number, because 12023122221 - 2¹⁰ = 12023121197 is a prime.

It is a super-2 number, since 2×12023122221² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12023122194 and 12023122203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12023122201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20240650 + ... + 20241243.

It is an arithmetic number, because the mean of its divisors is an integer number (1214456820).

Almost surely, 2^12023122221 is an apocalyptic number.

12023122221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12023122221 is a deficient number, since it is larger than the sum of its proper divisors (7408186899).

12023122221 is a wasteful number, since it uses less digits than its factorization.

12023122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40481913 (or 40481907 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 12023122221 its reverse (12222132021), we get a palindrome (24245254242).

The spelling of 12023122221 in words is "twelve billion, twenty-three million, one hundred twenty-two thousand, two hundred twenty-one".