12011201123 has 2 divisors, whose sum is σ = 12011201124. Its totient is φ = 12011201122.

The previous prime is 12011201119. The next prime is 12011201143. The reversal of 12011201123 is 32110211021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12011201123 - 2² = 12011201119 is a prime.

It is a super-2 number, since 2×12011201123² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12011201098 and 12011201107.

It is not a weakly prime, because it can be changed into another prime (12011201143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005600561 + 6005600562.

It is an arithmetic number, because the mean of its divisors is an integer number (6005600562).

Almost surely, 2^12011201123 is an apocalyptic number.

12011201123 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011201123 is an equidigital number, since it uses as much as digits as its factorization.

12011201123 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 12011201123 its reverse (32110211021), we get a palindrome (44121412144).

The spelling of 12011201123 in words is "twelve billion, eleven million, two hundred one thousand, one hundred twenty-three".