12045454021 has 8 divisors (see below), whose sum is σ = 12167019000. Its totient is φ = 11923934400.

The previous prime is 12045453941. The next prime is 12045454037.

12045454021 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 5822453025 + 6223000996 = 76305^2 + 78886^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12045454021 - 2¹⁵ = 12045421253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12045454051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 844255 + ... + 858403.

It is an arithmetic number, because the mean of its divisors is an integer number (1520877375).

Almost surely, 2^12045454021 is an apocalyptic number.

It is an amenable number.

12045454021 is a deficient number, since it is larger than the sum of its proper divisors (121564979).

12045454021 is a wasteful number, since it uses less digits than its factorization.

12045454021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22679.

The product of its (nonzero) digits is 6400, while the sum is 28.

The spelling of 12045454021 in words is "twelve billion, forty-five million, four hundred fifty-four thousand, twenty-one".