12121021204 has 48 divisors (see below), whose sum is σ = 22221029376. Its totient is φ = 5778568800.

The previous prime is 12121021201. The next prime is 12121021261. The reversal of 12121021204 is 40212012121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121021201) 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, 2531797 + ... + 2536579.

It is an arithmetic number, because the mean of its divisors is an integer number (462938112).

Almost surely, 2^12121021204 is an apocalyptic number.

It is an amenable number.

12121021204 is a deficient number, since it is larger than the sum of its proper divisors (10100008172).

12121021204 is a wasteful number, since it uses less digits than its factorization.

12121021204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5116 (or 5114 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12121021204 its reverse (40212012121), we get a palindrome (52333033325).

The spelling of 12121021204 in words is "twelve billion, one hundred twenty-one million, twenty-one thousand, two hundred four".