12121033312 has 24 divisors (see below), whose sum is σ = 23865772392. Its totient is φ = 6059884800.

The previous prime is 12121033291. The next prime is 12121033339. The reversal of 12121033312 is 21333012121.

It is a super-2 number, since 2×12121033312² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12121033312.

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, 513612 + ... + 536692.

It is an arithmetic number, because the mean of its divisors is an integer number (994407183).

Almost surely, 2^12121033312 is an apocalyptic number.

It is an amenable number.

12121033312 is a deficient number, since it is larger than the sum of its proper divisors (11744739080).

12121033312 is a wasteful number, since it uses less digits than its factorization.

12121033312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39502 (or 39494 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 12121033312 its reverse (21333012121), we get a palindrome (33454045433).

The spelling of 12121033312 in words is "twelve billion, one hundred twenty-one million, thirty-three thousand, three hundred twelve".