12101431421 has 2 divisors, whose sum is σ = 12101431422. Its totient is φ = 12101431420.

The previous prime is 12101431411. The next prime is 12101431427. The reversal of 12101431421 is 12413410121.

12101431421 is digitally balanced in base 2, because in such base 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., 12081307225 + 20124196 = 109915^2 + 4486^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12101431421 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12101431393 and 12101431402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12101431427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6050715710 + 6050715711.

It is an arithmetic number, because the mean of its divisors is an integer number (6050715711).

Almost surely, 2^12101431421 is an apocalyptic number.

It is an amenable number.

12101431421 is a deficient number, since it is larger than the sum of its proper divisors (1).

12101431421 is an equidigital number, since it uses as much as digits as its factorization.

12101431421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 12101431421 its reverse (12413410121), we get a palindrome (24514841542).

The spelling of 12101431421 in words is "twelve billion, one hundred one million, four hundred thirty-one thousand, four hundred twenty-one".