12122111115 has 24 divisors (see below), whose sum is σ = 21036768480. Its totient is φ = 6457400064.

The previous prime is 12122111101. The next prime is 12122111117. The reversal of 12122111115 is 51111122121.

It is a happy number.

It is not a de Polignac number, because 12122111115 - 2⁵ = 12122111083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12122111117) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 122782 + ... + 198291.

It is an arithmetic number, because the mean of its divisors is an integer number (876532020).

Almost surely, 2^12122111115 is an apocalyptic number.

12122111115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12122111115 is a deficient number, since it is larger than the sum of its proper divisors (8914657365).

12122111115 is a wasteful number, since it uses less digits than its factorization.

12122111115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321923 (or 321920 counting only the distinct ones).

The product of its digits is 40, while the sum is 18.

Adding to 12122111115 its reverse (51111122121), we get a palindrome (63233233236).

The spelling of 12122111115 in words is "twelve billion, one hundred twenty-two million, one hundred eleven thousand, one hundred fifteen".