12220434421 has 32 divisors (see below), whose sum is σ = 14178447360. Its totient is φ = 10436734656.

The previous prime is 12220434389. The next prime is 12220434431. The reversal of 12220434421 is 12443402221.

It is not a de Polignac number, because 12220434421 - 2⁵ = 12220434389 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 (12220434431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7510210 + ... + 7511836.

It is an arithmetic number, because the mean of its divisors is an integer number (443076480).

Almost surely, 2^12220434421 is an apocalyptic number.

It is an amenable number.

12220434421 is a deficient number, since it is larger than the sum of its proper divisors (1958012939).

12220434421 is a wasteful number, since it uses less digits than its factorization.

12220434421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2353.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 12220434421 its reverse (12443402221), we get a palindrome (24663836642).

The spelling of 12220434421 in words is "twelve billion, two hundred twenty million, four hundred thirty-four thousand, four hundred twenty-one".