12120401 has 2 divisors, whose sum is σ = 12120402. Its totient is φ = 12120400.

The previous prime is 12120391. The next prime is 12120403. The reversal of 12120401 is 10402121.

12120401 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10857025 + 1263376 = 3295^2 + 1124^2 .

It is a cyclic number.

It is not a de Polignac number, because 12120401 - 2¹⁰ = 12119377 is a prime.

It is a Sophie Germain prime.

Together with 12120403, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12120403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060200 + 6060201.

It is an arithmetic number, because the mean of its divisors is an integer number (6060201).

Almost surely, 2^12120401 is an apocalyptic number.

It is an amenable number.

12120401 is a deficient number, since it is larger than the sum of its proper divisors (1).

12120401 is an equidigital number, since it uses as much as digits as its factorization.

12120401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 12120401 is about 3481.4366287497. The cubic root of 12120401 is about 229.7059948487.

Adding to 12120401 its reverse (10402121), we get a palindrome (22522522).

It can be divided in two parts, 12120 and 401, that added together give a palindrome (12521).

The spelling of 12120401 in words is "twelve million, one hundred twenty thousand, four hundred one".