12211041421 has 4 divisors (see below), whose sum is σ = 12211668832. Its totient is φ = 12210414012.

The previous prime is 12211041413. The next prime is 12211041449. The reversal of 12211041421 is 12414011221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12414011221 = 3779 ⋅3284999.

It is a cyclic number.

It is not a de Polignac number, because 12211041421 - 2³ = 12211041413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211041461) 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, 283545 + ... + 323758.

It is an arithmetic number, because the mean of its divisors is an integer number (3052917208).

Almost surely, 2^12211041421 is an apocalyptic number.

It is an amenable number.

12211041421 is a deficient number, since it is larger than the sum of its proper divisors (627411).

12211041421 is an equidigital number, since it uses as much as digits as its factorization.

12211041421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627410.

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

Adding to 12211041421 its reverse (12414011221), we get a palindrome (24625052642).

The spelling of 12211041421 in words is "twelve billion, two hundred eleven million, forty-one thousand, four hundred twenty-one".