12123421024 has 96 divisors (see below), whose sum is σ = 28104330240. Its totient is φ = 5075212800.

The previous prime is 12123421019. The next prime is 12123421099. The reversal of 12123421024 is 42012432121.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 12123420986 and 12123421004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2189139 + ... + 2194669.

It is an arithmetic number, because the mean of its divisors is an integer number (292753440).

Almost surely, 2^12123421024 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12123421024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14052165120).

12123421024 is an abundant number, since it is smaller than the sum of its proper divisors (15980909216).

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

12123421024 is a wasteful number, since it uses less digits than its factorization.

12123421024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6044 (or 6036 counting only the distinct ones).

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

Adding to 12123421024 its reverse (42012432121), we get a palindrome (54135853145).

The spelling of 12123421024 in words is "twelve billion, one hundred twenty-three million, four hundred twenty-one thousand, twenty-four".