12354556564321 has 4 divisors (see below), whose sum is σ = 12476878906644. Its totient is φ = 12232234222000.

The previous prime is 12354556564283. The next prime is 12354556564331. The reversal of 12354556564321 is 12346565545321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7895195205921 + 4459361358400 = 2809839^2 + 2111720^2 .

It is a cyclic number.

It is not a de Polignac number, because 12354556564321 - 2³¹ = 12352409080673 is a prime.

It is a super-2 number, since 2×12354556564321² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12354556564331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61161171010 + ... + 61161171211.

It is an arithmetic number, because the mean of its divisors is an integer number (3119219726661).

Almost surely, 2^{12354556564321} is an apocalyptic number.

It is an amenable number.

12354556564321 is a deficient number, since it is larger than the sum of its proper divisors (122322342323).

12354556564321 is a wasteful number, since it uses less digits than its factorization.

12354556564321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122322342322.

The product of its digits is 12960000, while the sum is 52.

The spelling of 12354556564321 in words is "twelve trillion, three hundred fifty-four billion, five hundred fifty-six million, five hundred sixty-four thousand, three hundred twenty-one".