1321130002000 has 80 divisors (see below), whose sum is σ = 3362623617600. Its totient is φ = 500638723200.

The previous prime is 1321130001977. The next prime is 1321130002021. The reversal of 1321130002000 is 2000311231.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17345290 + ... + 17421289.

It is an arithmetic number, because the mean of its divisors is an integer number (42032795220).

Almost surely, 2^{1321130002000} is an apocalyptic number.

1321130002000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321130002000 is an abundant number, since it is smaller than the sum of its proper divisors (2041493615600).

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

1321130002000 is a wasteful number, since it uses less digits than its factorization.

1321130002000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34766621 (or 34766605 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 1321130002000 its reverse (2000311231), we get a palindrome (1323130313231).

The spelling of 1321130002000 in words is "one trillion, three hundred twenty-one billion, one hundred thirty million, two thousand".