12013121109 has 16 divisors (see below), whose sum is σ = 17508672000. Its totient is φ = 7266078960.

The previous prime is 12013121101. The next prime is 12013121123. The reversal of 12013121109 is 90112131021.

It is a happy number.

It is not a de Polignac number, because 12013121109 - 2³ = 12013121101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12013121101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 348297 + ... + 381230.

It is an arithmetic number, because the mean of its divisors is an integer number (1094292000).

Almost surely, 2^12013121109 is an apocalyptic number.

It is an amenable number.

12013121109 is a deficient number, since it is larger than the sum of its proper divisors (5495550891).

12013121109 is a wasteful number, since it uses less digits than its factorization.

12013121109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730040.

The product of its (nonzero) digits is 108, while the sum is 21.

The spelling of 12013121109 in words is "twelve billion, thirteen million, one hundred twenty-one thousand, one hundred nine".