12121230112 has 48 divisors (see below), whose sum is σ = 25278220800. Its totient is φ = 5701669888.

The previous prime is 12121230109. The next prime is 12121230131. The reversal of 12121230112 is 21103212121.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2242389 + ... + 2247787.

It is an arithmetic number, because the mean of its divisors is an integer number (526629600).

Almost surely, 2^12121230112 is an apocalyptic number.

It is an amenable number.

12121230112 is an abundant number, since it is smaller than the sum of its proper divisors (13156990688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12121230112 is a wasteful number, since it uses less digits than its factorization.

12121230112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9553 (or 9545 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 12121230112 its reverse (21103212121), we get a palindrome (33224442233).

The spelling of 12121230112 in words is "twelve billion, one hundred twenty-one million, two hundred thirty thousand, one hundred twelve".