12444021212121 has 16 divisors (see below), whose sum is σ = 19237134241920. Its totient is φ = 7935317874000.

The previous prime is 12444021212101. The next prime is 12444021212153. The reversal of 12444021212121 is 12121212044421.

12444021212121 is a `hidden beast` number, since 1 + 2 + 4 + 440 + 2 + 1 + 2 + 1 + 212 + 1 = 666.

It is not a de Polignac number, because 12444021212121 - 2²³ = 12444012823513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (12444021212101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10019340130 + ... + 10019341371.

It is an arithmetic number, because the mean of its divisors is an integer number (1202320890120).

Almost surely, 2^{12444021212121} is an apocalyptic number.

It is an amenable number.

12444021212121 is a deficient number, since it is larger than the sum of its proper divisors (6793113029799).

12444021212121 is a wasteful number, since it uses less digits than its factorization.

12444021212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20038681533 (or 20038681527 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

Adding to 12444021212121 its reverse (12121212044421), we get a palindrome (24565233256542).

The spelling of 12444021212121 in words is "twelve trillion, four hundred forty-four billion, twenty-one million, two hundred twelve thousand, one hundred twenty-one".