12101313222121 has 4 divisors (see below), whose sum is σ = 12101332795092. Its totient is φ = 12101293649152.

The previous prime is 12101313222101. The next prime is 12101313222127. The reversal of 12101313222121 is 12122231310121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5233978508521 + 6867334713600 = 2287789^2 + 2620560^2 .

It is a cyclic number.

It is not a de Polignac number, because 12101313222121 - 2²⁷ = 12101179004393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12101313222092 and 12101313222101.

It is not an unprimeable number, because it can be changed into a prime (12101313222127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8827780 + ... + 10106053.

It is an arithmetic number, because the mean of its divisors is an integer number (3025333198773).

Almost surely, 2^{12101313222121} is an apocalyptic number.

It is an amenable number.

12101313222121 is a deficient number, since it is larger than the sum of its proper divisors (19572971).

12101313222121 is an equidigital number, since it uses as much as digits as its factorization.

12101313222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19572970.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 12101313222121 its reverse (12122231310121), we get a palindrome (24223544532242).

The spelling of 12101313222121 in words is "twelve trillion, one hundred one billion, three hundred thirteen million, two hundred twenty-two thousand, one hundred twenty-one".