12045254021 has 2 divisors, whose sum is σ = 12045254022. Its totient is φ = 12045254020.

The previous prime is 12045254017. The next prime is 12045254027.

12045254021 is nontrivially palindromic in base 10.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11344593121 + 700660900 = 106511^2 + 26470^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 12045254021 - 2² = 12045254017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12045254027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6022627010 + 6022627011.

It is an arithmetic number, because the mean of its divisors is an integer number (6022627011).

Almost surely, 2^12045254021 is an apocalyptic number.

It is an amenable number.

12045254021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12045254021 is an equidigital number, since it uses as much as digits as its factorization.

12045254021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3200, while the sum is 26.

The spelling of 12045254021 in words is "twelve billion, forty-five million, two hundred fifty-four thousand, twenty-one".