1321010455504 has 20 divisors (see below), whose sum is σ = 2559480222340. Its totient is φ = 660499430400.

The previous prime is 1321010455489. The next prime is 1321010455507. The reversal of 1321010455504 is 4055540101231.

It can be written as a sum of positive squares in 2 ways, for example, as 1312747645504 + 8262810000 = 1145752^2 + 90900^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321010455507) 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, 1974082 + ... + 2557150.

It is an arithmetic number, because the mean of its divisors is an integer number (127974011117).

Almost surely, 2^{1321010455504} is an apocalyptic number.

It is an amenable number.

1321010455504 is a deficient number, since it is larger than the sum of its proper divisors (1238469766836).

1321010455504 is a wasteful number, since it uses less digits than its factorization.

1321010455504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724678 (or 724672 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 1321010455504 its reverse (4055540101231), we get a palindrome (5376550556735).

The spelling of 1321010455504 in words is "one trillion, three hundred twenty-one billion, ten million, four hundred fifty-five thousand, five hundred four".