1212200100120 has 128 divisors (see below), whose sum is σ = 3644077536000. Its totient is φ = 322589329920.

The previous prime is 1212200100113. The next prime is 1212200100161. The reversal of 1212200100120 is 210010022121.

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

It is a junction number, because it is equal to n+sod(n) for n = 1212200100096 and 1212200100105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 180679326 + ... + 180686034.

It is an arithmetic number, because the mean of its divisors is an integer number (28469355750).

Almost surely, 2^{1212200100120} is an apocalyptic number.

1212200100120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212200100120 is an abundant number, since it is smaller than the sum of its proper divisors (2431877435880).

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

1212200100120 is a wasteful number, since it uses less digits than its factorization.

1212200100120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9593 (or 9589 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1212200100120 its reverse (210010022121), we get a palindrome (1422210122241).

The spelling of 1212200100120 in words is "one trillion, two hundred twelve billion, two hundred million, one hundred thousand, one hundred twenty".