12222012021 has 16 divisors (see below), whose sum is σ = 17009773440. Its totient is φ = 7791347520.

The previous prime is 12222012007. The next prime is 12222012037. The reversal of 12222012021 is 12021022221.

It is not a de Polignac number, because 12222012021 - 2⁶ = 12222011957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222012001) 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 15 ways as a sum of consecutive naturals, for example, 213831 + ... + 264891.

It is an arithmetic number, because the mean of its divisors is an integer number (1063110840).

Almost surely, 2^12222012021 is an apocalyptic number.

It is an amenable number.

12222012021 is a deficient number, since it is larger than the sum of its proper divisors (4787761419).

12222012021 is a wasteful number, since it uses less digits than its factorization.

12222012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54556.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 12222012021 its reverse (12021022221), we get a palindrome (24243034242).

The spelling of 12222012021 in words is "twelve billion, two hundred twenty-two million, twelve thousand, twenty-one".