12121003072 has 28 divisors (see below), whose sum is σ = 24056254656. Its totient is φ = 6059584640.

The previous prime is 12121003057. The next prime is 12121003073. The reversal of 12121003072 is 27030012121.

It is not an unprimeable number, because it can be changed into a prime (12121003073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 652797 + ... + 671107.

It is an arithmetic number, because the mean of its divisors is an integer number (859151952).

Almost surely, 2^12121003072 is an apocalyptic number.

It is an amenable number.

12121003072 is a deficient number, since it is larger than the sum of its proper divisors (11935251584).

12121003072 is a wasteful number, since it uses less digits than its factorization.

12121003072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28666 (or 28656 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 19.

Adding to 12121003072 its reverse (27030012121), we get a palindrome (39151015193).

The spelling of 12121003072 in words is "twelve billion, one hundred twenty-one million, three thousand, seventy-two".