1321025453200 has 60 divisors (see below), whose sum is σ = 3360455648100. Its totient is φ = 497327226880.

The previous prime is 1321025453173. The next prime is 1321025453201. The reversal of 1321025453200 is 23545201231.

It can be written as a sum of positive squares in 6 ways, for example, as 136968088464 + 1184057364736 = 370092^2 + 1088144^2 .

It is not an unprimeable number, because it can be changed into a prime (1321025453201) 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 11 ways as a sum of consecutive naturals, for example, 97127425 + ... + 97141024.

It is an arithmetic number, because the mean of its divisors is an integer number (56007594135).

Almost surely, 2^{1321025453200} is an apocalyptic number.

1321025453200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321025453200 is an abundant number, since it is smaller than the sum of its proper divisors (2039430194900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1321025453200 is a wasteful number, since it uses less digits than its factorization.

1321025453200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194268484 (or 194268473 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The spelling of 1321025453200 in words is "one trillion, three hundred twenty-one billion, twenty-five million, four hundred fifty-three thousand, two hundred".