1321602203100 has 72 divisors (see below), whose sum is σ = 3824788753408. Its totient is φ = 352339416000.

The previous prime is 1321602203093. The next prime is 1321602203143. The reversal of 1321602203100 is 13022061231.

It is a super-2 number, since 2×1321602203100² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 661125 + ... + 1755075.

Almost surely, 2^{1321602203100} is an apocalyptic number.

1321602203100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321602203100 is an abundant number, since it is smaller than the sum of its proper divisors (2503186550308).

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

1321602203100 is a wasteful number, since it uses less digits than its factorization.

1321602203100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1097995 (or 1097988 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1321602203100 its reverse (13022061231), we get a palindrome (1334624264331).

The spelling of 1321602203100 in words is "one trillion, three hundred twenty-one billion, six hundred two million, two hundred three thousand, one hundred".