12121113615611 has 48 divisors (see below), whose sum is σ = 16526912274432. Its totient is φ = 8649832847040.

The previous prime is 12121113615587. The next prime is 12121113615613. The reversal of 12121113615611 is 11651631112121.

It is not a de Polignac number, because 12121113615611 - 2⁶ = 12121113615547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12121113615613) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2935535 + ... + 5732328.

It is an arithmetic number, because the mean of its divisors is an integer number (344310672384).

Almost surely, 2^{12121113615611} is an apocalyptic number.

12121113615611 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12121113615611 is a deficient number, since it is larger than the sum of its proper divisors (4405798658821).

12121113615611 is a wasteful number, since it uses less digits than its factorization.

12121113615611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8668032 (or 8668021 counting only the distinct ones).

The product of its digits is 2160, while the sum is 32.

Adding to 12121113615611 its reverse (11651631112121), we get a palindrome (23772744727732).

The spelling of 12121113615611 in words is "twelve trillion, one hundred twenty-one billion, one hundred thirteen million, six hundred fifteen thousand, six hundred eleven".