12352121816 has 8 divisors (see below), whose sum is σ = 23160228420. Its totient is φ = 6176060904.

The previous prime is 12352121797. The next prime is 12352121857. The reversal of 12352121816 is 61812125321.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 772007606 + ... + 772007621.

Almost surely, 2^12352121816 is an apocalyptic number.

It is an amenable number.

12352121816 is a deficient number, since it is larger than the sum of its proper divisors (10808106604).

12352121816 is a wasteful number, since it uses less digits than its factorization.

12352121816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1544015233 (or 1544015229 counting only the distinct ones).

The product of its digits is 5760, while the sum is 32.

The spelling of 12352121816 in words is "twelve billion, three hundred fifty-two million, one hundred twenty-one thousand, eight hundred sixteen".