12021222011 has 4 divisors (see below), whose sum is σ = 12033452112. Its totient is φ = 12008991912.

The previous prime is 12021221999. The next prime is 12021222023. The reversal of 12021222011 is 11022212021.

12021222011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11022212021 = 17 ⋅648365413.

It is an interprime number because it is at equal distance from previous prime (12021221999) and next prime (12021222023).

It is a cyclic number.

It is not a de Polignac number, because 12021222011 - 2¹⁰ = 12021220987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12021224011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6113576 + ... + 6115541.

It is an arithmetic number, because the mean of its divisors is an integer number (3008363028).

Almost surely, 2^12021222011 is an apocalyptic number.

12021222011 is a deficient number, since it is larger than the sum of its proper divisors (12230101).

12021222011 is an equidigital number, since it uses as much as digits as its factorization.

12021222011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12230100.

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

Adding to 12021222011 its reverse (11022212021), we get a palindrome (23043434032).

The spelling of 12021222011 in words is "twelve billion, twenty-one million, two hundred twenty-two thousand, eleven".