12021221101 has 16 divisors (see below), whose sum is σ = 13298252544. Its totient is φ = 10808734464.

The previous prime is 12021221077. The next prime is 12021221117. The reversal of 12021221101 is 10112212021.

12021221101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12021221101 - 2¹³ = 12021212909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021221171) 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 15 ways as a sum of consecutive naturals, for example, 303115 + ... + 340471.

It is an arithmetic number, because the mean of its divisors is an integer number (831140784).

Almost surely, 2^12021221101 is an apocalyptic number.

It is an amenable number.

12021221101 is a deficient number, since it is larger than the sum of its proper divisors (1277031443).

12021221101 is a wasteful number, since it uses less digits than its factorization.

12021221101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38220.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12021221101 its reverse (10112212021), we get a palindrome (22133433122).

The spelling of 12021221101 in words is "twelve billion, twenty-one million, two hundred twenty-one thousand, one hundred one".