12121120412 has 24 divisors (see below), whose sum is σ = 21577941840. Its totient is φ = 5956162560.

The previous prime is 12121120399. The next prime is 12121120423. The reversal of 12121120412 is 21402112121.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 276539 + ... + 317357.

It is an arithmetic number, because the mean of its divisors is an integer number (899080910).

Almost surely, 2^12121120412 is an apocalyptic number.

It is an amenable number.

12121120412 is a deficient number, since it is larger than the sum of its proper divisors (9456821428).

12121120412 is a wasteful number, since it uses less digits than its factorization.

12121120412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42101 (or 42099 counting only the distinct ones).

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

Adding to 12121120412 its reverse (21402112121), we get a palindrome (33523232533).

The spelling of 12121120412 in words is "twelve billion, one hundred twenty-one million, one hundred twenty thousand, four hundred twelve".