12013554321 has 12 divisors (see below), whose sum is σ = 17353911172. Its totient is φ = 8008574976.

The previous prime is 12013554227. The next prime is 12013554323. The reversal of 12013554321 is 12345531021.

It can be written as a sum of positive squares in 2 ways, for example, as 9987204096 + 2026350225 = 99936^2 + 45015^2 .

It is not a de Polignac number, because 12013554321 - 2¹¹ = 12013552273 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12013554323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 213285 + ... + 263661.

Almost surely, 2^12013554321 is an apocalyptic number.

It is an amenable number.

12013554321 is a deficient number, since it is larger than the sum of its proper divisors (5340356851).

12013554321 is a wasteful number, since it uses less digits than its factorization.

12013554321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76880 (or 76877 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The spelling of 12013554321 in words is "twelve billion, thirteen million, five hundred fifty-four thousand, three hundred twenty-one".