12219421242 has 64 divisors (see below), whose sum is σ = 28547334144. Its totient is φ = 3414230400.

The previous prime is 12219421231. The next prime is 12219421267. The reversal of 12219421242 is 24212491221.

12219421242 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4639558 + ... + 4642190.

It is an arithmetic number, because the mean of its divisors is an integer number (446052096).

Almost surely, 2^12219421242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12219421242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14273667072).

12219421242 is an abundant number, since it is smaller than the sum of its proper divisors (16327912902).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12219421242 is a wasteful number, since it uses less digits than its factorization.

12219421242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5043.

The product of its digits is 4608, while the sum is 30.

The spelling of 12219421242 in words is "twelve billion, two hundred nineteen million, four hundred twenty-one thousand, two hundred forty-two".