12021122109 has 32 divisors (see below), whose sum is σ = 16982784000. Its totient is φ = 7547798720.

The previous prime is 12021122081. The next prime is 12021122117. The reversal of 12021122109 is 90122112021.

It is a cyclic number.

It is not a de Polignac number, because 12021122109 - 2¹¹ = 12021120061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021122119) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6166867 + ... + 6168815.

It is an arithmetic number, because the mean of its divisors is an integer number (530712000).

Almost surely, 2^12021122109 is an apocalyptic number.

It is an amenable number.

12021122109 is a deficient number, since it is larger than the sum of its proper divisors (4961661891).

12021122109 is a wasteful number, since it uses less digits than its factorization.

12021122109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3305.

The product of its (nonzero) digits is 144, while the sum is 21.

The spelling of 12021122109 in words is "twelve billion, twenty-one million, one hundred twenty-two thousand, one hundred nine".