1321321040210 has 64 divisors (see below), whose sum is σ = 2466478965600. Its totient is φ = 509041999872.

The previous prime is 1321321040203. The next prime is 1321321040227. The reversal of 1321321040210 is 120401231231.

It can be written as a sum of positive squares in 16 ways, for example, as 567652244329 + 753668795881 = 753427^2 + 868141^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 398827514 + ... + 398830826.

Almost surely, 2^{1321321040210} is an apocalyptic number.

1321321040210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321321040210 is a deficient number, since it is larger than the sum of its proper divisors (1145157925390).

1321321040210 is a wasteful number, since it uses less digits than its factorization.

1321321040210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6335.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1321321040210 its reverse (120401231231), we get a palindrome (1441722271441).

The spelling of 1321321040210 in words is "one trillion, three hundred twenty-one billion, three hundred twenty-one million, forty thousand, two hundred ten".