12121240412 has 12 divisors (see below), whose sum is σ = 21528770760. Its totient is φ = 5970163056.

The previous prime is 12121240409. The next prime is 12121240423. The reversal of 12121240412 is 21404212121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22613987 + ... + 22614522.

It is an arithmetic number, because the mean of its divisors is an integer number (1794064230).

Almost surely, 2^12121240412 is an apocalyptic number.

It is an amenable number.

12121240412 is a deficient number, since it is larger than the sum of its proper divisors (9407530348).

12121240412 is a wasteful number, since it uses less digits than its factorization.

12121240412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45228580 (or 45228578 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 12121240412 its reverse (21404212121), we get a palindrome (33525452533).

The spelling of 12121240412 in words is "twelve billion, one hundred twenty-one million, two hundred forty thousand, four hundred twelve".