1204538354021 has 4 divisors (see below), whose sum is σ = 1204789252044. Its totient is φ = 1204287456000.

The previous prime is 1204538353979. The next prime is 1204538354027.

1204538354021 is nontrivially palindromic in base 10.

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 259921530625 + 944616823396 = 509825^2 + 971914^2 .

It is a cyclic number.

It is not a de Polignac number, because 1204538354021 - 2⁶ = 1204538353957 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 (1204538354027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125441810 + ... + 125451411.

It is an arithmetic number, because the mean of its divisors is an integer number (301197313011).

Almost surely, 2^{1204538354021} is an apocalyptic number.

It is an amenable number.

1204538354021 is a deficient number, since it is larger than the sum of its proper divisors (250898023).

1204538354021 is an equidigital number, since it uses as much as digits as its factorization.

1204538354021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250898022.

The product of its (nonzero) digits is 115200, while the sum is 38.

The spelling of 1204538354021 in words is "one trillion, two hundred four billion, five hundred thirty-eight million, three hundred fifty-four thousand, twenty-one".