12121133712 has 40 divisors (see below), whose sum is σ = 32392688640. Its totient is φ = 3901054080.

The previous prime is 12121133711. The next prime is 12121133747. The reversal of 12121133712 is 21733112121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (12121133711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4352464 + ... + 4355247.

It is an arithmetic number, because the mean of its divisors is an integer number (809817216).

Almost surely, 2^12121133712 is an apocalyptic number.

12121133712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12121133712 is an abundant number, since it is smaller than the sum of its proper divisors (20271554928).

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

12121133712 is a wasteful number, since it uses less digits than its factorization.

12121133712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8707751 (or 8707745 counting only the distinct ones).

The product of its digits is 504, while the sum is 24.

Adding to 12121133712 its reverse (21733112121), we get a palindrome (33854245833).

The spelling of 12121133712 in words is "twelve billion, one hundred twenty-one million, one hundred thirty-three thousand, seven hundred twelve".