1321013321002 has 32 divisors (see below), whose sum is σ = 2027405237760. Its totient is φ = 645358034880.

The previous prime is 1321013320981. The next prime is 1321013321003. The reversal of 1321013321002 is 2001233101231.

It is not an unprimeable number, because it can be changed into a prime (1321013321003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88847973 + ... + 88862839.

It is an arithmetic number, because the mean of its divisors is an integer number (63356413680).

Almost surely, 2^{1321013321002} is an apocalyptic number.

1321013321002 is a deficient number, since it is larger than the sum of its proper divisors (706391916758).

1321013321002 is a wasteful number, since it uses less digits than its factorization.

1321013321002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19726.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1321013321002 its reverse (2001233101231), we get a palindrome (3322246422233).

The spelling of 1321013321002 in words is "one trillion, three hundred twenty-one billion, thirteen million, three hundred twenty-one thousand, two".