12122104135681 has 4 divisors (see below), whose sum is σ = 12139852458672. Its totient is φ = 12104355812692.

The previous prime is 12122104135679. The next prime is 12122104135697. The reversal of 12122104135681 is 18653140122121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12122104135681 - 2¹ = 12122104135679 is a prime.

It is a super-2 number, since 2×12122104135681² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12122104135681.

It is not an unprimeable number, because it can be changed into a prime (12122104165681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8874160471 + ... + 8874161836.

It is an arithmetic number, because the mean of its divisors is an integer number (3034963114668).

Almost surely, 2^{12122104135681} is an apocalyptic number.

It is an amenable number.

12122104135681 is a deficient number, since it is larger than the sum of its proper divisors (17748322991).

12122104135681 is an equidigital number, since it uses as much as digits as its factorization.

12122104135681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17748322990.

The product of its (nonzero) digits is 23040, while the sum is 37.

The spelling of 12122104135681 in words is "twelve trillion, one hundred twenty-two billion, one hundred four million, one hundred thirty-five thousand, six hundred eighty-one".