1321003100100 has 72 divisors (see below), whose sum is σ = 3822238361088. Its totient is φ = 352254953600.

The previous prime is 1321003100063. The next prime is 1321003100113. The reversal of 1321003100100 is 10013001231.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10941262 + ... + 11061338.

It is an arithmetic number, because the mean of its divisors is an integer number (53086643904).

Almost surely, 2^{1321003100100} is an apocalyptic number.

1321003100100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321003100100 is an abundant number, since it is smaller than the sum of its proper divisors (2501235260988).

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

1321003100100 is a wasteful number, since it uses less digits than its factorization.

1321003100100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156765 (or 156758 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 1321003100100 its reverse (10013001231), we get a palindrome (1331016101331).

The spelling of 1321003100100 in words is "one trillion, three hundred twenty-one billion, three million, one hundred thousand, one hundred".