12011320121 has 2 divisors, whose sum is σ = 12011320122. Its totient is φ = 12011320120.

The previous prime is 12011320103. The next prime is 12011320157. The reversal of 12011320121 is 12102311021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10571952400 + 1439367721 = 102820^2 + 37939^2 .

It is a cyclic number.

It is not a de Polignac number, because 12011320121 - 2¹⁰ = 12011319097 is a prime.

It is a super-2 number, since 2×12011320121² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12011320096 and 12011320105.

It is not a weakly prime, because it can be changed into another prime (12011320721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005660060 + 6005660061.

It is an arithmetic number, because the mean of its divisors is an integer number (6005660061).

Almost surely, 2^12011320121 is an apocalyptic number.

It is an amenable number.

12011320121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011320121 is an equidigital number, since it uses as much as digits as its factorization.

12011320121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 12011320121 its reverse (12102311021), we get a palindrome (24113631142).

The spelling of 12011320121 in words is "twelve billion, eleven million, three hundred twenty thousand, one hundred twenty-one".