12222121004 has 6 divisors (see below), whose sum is σ = 21388711764. Its totient is φ = 6111060500.

The previous prime is 12222121001. The next prime is 12222121031. The reversal of 12222121004 is 40012122221.

12222121004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (12222121001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1527765122 + ... + 1527765129.

It is an arithmetic number, because the mean of its divisors is an integer number (3564785294).

Almost surely, 2^12222121004 is an apocalyptic number.

It is an amenable number.

12222121004 is a deficient number, since it is larger than the sum of its proper divisors (9166590760).

12222121004 is a wasteful number, since it uses less digits than its factorization.

12222121004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3055530255 (or 3055530253 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 12222121004 its reverse (40012122221), we get a palindrome (52234243225).

The spelling of 12222121004 in words is "twelve billion, two hundred twenty-two million, one hundred twenty-one thousand, four".