1213331312100 has 36 divisors (see below), whose sum is σ = 3510571930544. Its totient is φ = 323555016480.

The previous prime is 1213331312077. The next prime is 1213331312119. The reversal of 1213331312100 is 12131333121.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2022218554 + ... + 2022219153.

Almost surely, 2^{1213331312100} is an apocalyptic number.

1213331312100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213331312100 is an abundant number, since it is smaller than the sum of its proper divisors (2297240618444).

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

1213331312100 is a wasteful number, since it uses less digits than its factorization.

1213331312100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4044437724 (or 4044437717 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 1213331312100 its reverse (12131333121), we get a palindrome (1225462645221).

The spelling of 1213331312100 in words is "one trillion, two hundred thirteen billion, three hundred thirty-one million, three hundred twelve thousand, one hundred".