12121022115 has 16 divisors (see below), whose sum is σ = 21548484000. Its totient is φ = 6464545056.

The previous prime is 12121022101. The next prime is 12121022119. The reversal of 12121022115 is 51122012121.

12121022115 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12121022115 - 2⁹ = 12121021603 is a prime.

It is a super-2 number, since 2×12121022115² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12121022119) 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, 44892540 + ... + 44892809.

It is an arithmetic number, because the mean of its divisors is an integer number (1346780250).

Almost surely, 2^12121022115 is an apocalyptic number.

12121022115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12121022115 is a deficient number, since it is larger than the sum of its proper divisors (9427461885).

12121022115 is an equidigital number, since it uses as much as digits as its factorization.

12121022115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89785363 (or 89785357 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

Adding to 12121022115 its reverse (51122012121), we get a palindrome (63243034236).

The spelling of 12121022115 in words is "twelve billion, one hundred twenty-one million, twenty-two thousand, one hundred fifteen".