1321020100002 has 64 divisors (see below), whose sum is σ = 2874346058880. Its totient is φ = 403056331776.

The previous prime is 1321020099961. The next prime is 1321020100013. The reversal of 1321020100002 is 2000010201231.

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, 8486073 + ... + 8640339.

It is an arithmetic number, because the mean of its divisors is an integer number (44911657170).

Almost surely, 2^{1321020100002} is an apocalyptic number.

1321020100002 is an abundant number, since it is smaller than the sum of its proper divisors (1553325958878).

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

1321020100002 is a wasteful number, since it uses less digits than its factorization.

1321020100002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156595.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 1321020100002 its reverse (2000010201231), we get a palindrome (3321030301233).

The spelling of 1321020100002 in words is "one trillion, three hundred twenty-one billion, twenty million, one hundred thousand, two".