1321035005204 has 12 divisors (see below), whose sum is σ = 2315417833428. Its totient is φ = 659487052800.

The previous prime is 1321035005197. The next prime is 1321035005209. The reversal of 1321035005204 is 4025005301231.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 734894707600 + 586140297604 = 857260^2 + 765598^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321035005209) 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, 257609567 + ... + 257614694.

It is an arithmetic number, because the mean of its divisors is an integer number (192951486119).

Almost surely, 2^{1321035005204} is an apocalyptic number.

It is an amenable number.

1321035005204 is a deficient number, since it is larger than the sum of its proper divisors (994382828224).

1321035005204 is a wasteful number, since it uses less digits than its factorization.

1321035005204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515224906 (or 515224904 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The spelling of 1321035005204 in words is "one trillion, three hundred twenty-one billion, thirty-five million, five thousand, two hundred four".