12401101421 has 4 divisors (see below), whose sum is σ = 12402743100. Its totient is φ = 12399459744.

The previous prime is 12401101403. The next prime is 12401101501. The reversal of 12401101421 is 12410110421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12410110421 = 251 ⋅49442671.

It can be written as a sum of positive squares in 2 ways, for example, as 6012296521 + 6388804900 = 77539^2 + 79930^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12401101421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12401101421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12401101721) 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, 809456 + ... + 824633.

It is an arithmetic number, because the mean of its divisors is an integer number (3100685775).

Almost surely, 2^12401101421 is an apocalyptic number.

It is an amenable number.

12401101421 is a deficient number, since it is larger than the sum of its proper divisors (1641679).

12401101421 is an equidigital number, since it uses as much as digits as its factorization.

12401101421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1641678.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12401101421 its reverse (12410110421), we get a palindrome (24811211842).

The spelling of 12401101421 in words is "twelve billion, four hundred one million, one hundred one thousand, four hundred twenty-one".