1212313031100 has 108 divisors (see below), whose sum is σ = 3834789878920. Its totient is φ = 320317545600.

The previous prime is 1212313031081. The next prime is 1212313031107. The reversal of 1212313031100 is 11303132121.

1212313031100 is a `hidden beast` number, since 1 + 21 + 231 + 303 + 110 + 0 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212313031107) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6080866 + ... + 6277065.

Almost surely, 2^{1212313031100} is an apocalyptic number.

1212313031100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212313031100 is an abundant number, since it is smaller than the sum of its proper divisors (2622476847820).

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

1212313031100 is a wasteful number, since it uses less digits than its factorization.

1212313031100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12358060 (or 12358050 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 1212313031100 its reverse (11303132121), we get a palindrome (1223616163221).

The spelling of 1212313031100 in words is "one trillion, two hundred twelve billion, three hundred thirteen million, thirty-one thousand, one hundred".