1321302212100 has 216 divisors, whose sum is σ = 4470790309440. Its totient is φ = 324466179840.

The previous prime is 1321302212071. The next prime is 1321302212117. The reversal of 1321302212100 is 12122031231.

1321302212100 is a `hidden beast` number, since 1 + 321 + 30 + 2 + 212 + 100 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 71 ways as a sum of consecutive naturals, for example, 4767537 + ... + 5037063.

Almost surely, 2^{1321302212100} is an apocalyptic number.

1321302212100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321302212100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2235395154720).

1321302212100 is an abundant number, since it is smaller than the sum of its proper divisors (3149488097340).

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

1321302212100 is a wasteful number, since it uses less digits than its factorization.

1321302212100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269979 (or 269969 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1321302212100 its reverse (12122031231), we get a palindrome (1333424243331).

The spelling of 1321302212100 in words is "one trillion, three hundred twenty-one billion, three hundred two million, two hundred twelve thousand, one hundred".