12121121316 has 12 divisors (see below), whose sum is σ = 28282616432. Its totient is φ = 4040373768.

The previous prime is 12121121297. The next prime is 12121121321. The reversal of 12121121316 is 61312112121.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 12121121292 and 12121121301.

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, 505046710 + ... + 505046733.

Almost surely, 2^12121121316 is an apocalyptic number.

It is an amenable number.

12121121316 is an abundant number, since it is smaller than the sum of its proper divisors (16161495116).

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

12121121316 is a wasteful number, since it uses less digits than its factorization.

12121121316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010093450 (or 1010093448 counting only the distinct ones).

The product of its digits is 144, while the sum is 21.

Adding to 12121121316 its reverse (61312112121), we get a palindrome (73433233437).

The spelling of 12121121316 in words is "twelve billion, one hundred twenty-one million, one hundred twenty-one thousand, three hundred sixteen".