12402443121 has 8 divisors (see below), whose sum is σ = 16641920064. Its totient is φ = 8215630800.

The previous prime is 12402443099. The next prime is 12402443149. The reversal of 12402443121 is 12134420421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12402443121 - 2⁶ = 12402443057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12402443091 and 12402443100.

It is not an unprimeable number, because it can be changed into a prime (12402443171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13165605 + ... + 13166546.

It is an arithmetic number, because the mean of its divisors is an integer number (2080240008).

Almost surely, 2^12402443121 is an apocalyptic number.

It is an amenable number.

12402443121 is a deficient number, since it is larger than the sum of its proper divisors (4239476943).

12402443121 is a wasteful number, since it uses less digits than its factorization.

12402443121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26332311.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 12402443121 its reverse (12134420421), we get a palindrome (24536863542).

The spelling of 12402443121 in words is "twelve billion, four hundred two million, four hundred forty-three thousand, one hundred twenty-one".