12012222021 has 8 divisors (see below), whose sum is σ = 16017703104. Its totient is φ = 8007444480.

The previous prime is 12012222017. The next prime is 12012222091. The reversal of 12012222021 is 12022221021.

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

It is not a de Polignac number, because 12012222021 - 2² = 12012222017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012222011) 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, 134665 + ... + 205326.

It is an arithmetic number, because the mean of its divisors is an integer number (2002212888).

Almost surely, 2^12012222021 is an apocalyptic number.

It is an amenable number.

12012222021 is a deficient number, since it is larger than the sum of its proper divisors (4005481083).

12012222021 is a wasteful number, since it uses less digits than its factorization.

12012222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351771.

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

Adding to 12012222021 its reverse (12022221021), we get a palindrome (24034443042).

It can be divided in two parts, 1201 and 2222021, that added together give a palindrome (2223222).

The spelling of 12012222021 in words is "twelve billion, twelve million, two hundred twenty-two thousand, twenty-one".