12220413421 has 4 divisors (see below), whose sum is σ = 12226150144. Its totient is φ = 12214676700.

The previous prime is 12220413419. The next prime is 12220413461. The reversal of 12220413421 is 12431402221.

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: 12431402221 = 7 ⋅1775914603.

It is a cyclic number.

It is not a de Polignac number, because 12220413421 - 2¹ = 12220413419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12220413392 and 12220413401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220413461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2865165 + ... + 2869426.

It is an arithmetic number, because the mean of its divisors is an integer number (3056537536).

Almost surely, 2^12220413421 is an apocalyptic number.

It is an amenable number.

12220413421 is a deficient number, since it is larger than the sum of its proper divisors (5736723).

12220413421 is an equidigital number, since it uses as much as digits as its factorization.

12220413421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5736722.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 12220413421 its reverse (12431402221), we get a palindrome (24651815642).

The spelling of 12220413421 in words is "twelve billion, two hundred twenty million, four hundred thirteen thousand, four hundred twenty-one".