12421201122 has 48 divisors (see below), whose sum is σ = 30446593632. Its totient is φ = 3763998720.

The previous prime is 12421201103. The next prime is 12421201123. The reversal of 12421201122 is 22110212421.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12421201095 and 12421201104.

It is not an unprimeable number, because it can be changed into a prime (12421201123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1156383 + ... + 1167074.

It is an arithmetic number, because the mean of its divisors is an integer number (634304034).

Almost surely, 2^12421201122 is an apocalyptic number.

12421201122 is an abundant number, since it is smaller than the sum of its proper divisors (18025392510).

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

12421201122 is a wasteful number, since it uses less digits than its factorization.

12421201122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2323485 (or 2323473 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12421201122 its reverse (22110212421), we get a palindrome (34531413543).

The spelling of 12421201122 in words is "twelve billion, four hundred twenty-one million, two hundred one thousand, one hundred twenty-two".