12421211401 has 4 divisors (see below), whose sum is σ = 12421552900. Its totient is φ = 12420869904.

The previous prime is 12421211399. The next prime is 12421211423. The reversal of 12421211401 is 10411212421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10411212421 = 79 ⋅131787499.

It can be written as a sum of positive squares in 2 ways, for example, as 11009255625 + 1411955776 = 104925^2 + 37576^2 .

It is a cyclic number.

It is not a de Polignac number, because 12421211401 - 2¹ = 12421211399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12421211501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108666 + ... + 191443.

It is an arithmetic number, because the mean of its divisors is an integer number (3105388225).

Almost surely, 2^12421211401 is an apocalyptic number.

It is an amenable number.

12421211401 is a deficient number, since it is larger than the sum of its proper divisors (341499).

12421211401 is an equidigital number, since it uses as much as digits as its factorization.

12421211401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341498.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 12421211401 its reverse (10411212421), we get a palindrome (22832423822).

The spelling of 12421211401 in words is "twelve billion, four hundred twenty-one million, two hundred eleven thousand, four hundred one".