12121210124 has 6 divisors (see below), whose sum is σ = 21212117724. Its totient is φ = 6060605060.

The previous prime is 12121210121. The next prime is 12121210139. The reversal of 12121210124 is 42101212121.

It is not an unprimeable number, because it can be changed into a prime (12121210121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1515151262 + ... + 1515151269.

It is an arithmetic number, because the mean of its divisors is an integer number (3535352954).

Almost surely, 2^12121210124 is an apocalyptic number.

It is an amenable number.

12121210124 is a deficient number, since it is larger than the sum of its proper divisors (9090907600).

12121210124 is a wasteful number, since it uses less digits than its factorization.

12121210124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3030302535 (or 3030302533 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12121210124 its reverse (42101212121), we get a palindrome (54222422245).

The spelling of 12121210124 in words is "twelve billion, one hundred twenty-one million, two hundred ten thousand, one hundred twenty-four".