1212102212100 has 144 divisors (see below), whose sum is σ = 3777265947840. Its totient is φ = 298325721600.

The previous prime is 1212102212093. The next prime is 1212102212171. The reversal of 1212102212100 is 12122012121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1212102212100.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42335790 + ... + 42364410.

Almost surely, 2^{1212102212100} is an apocalyptic number.

1212102212100 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 1212102212100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1888632973920).

1212102212100 is an abundant number, since it is smaller than the sum of its proper divisors (2565163735740).

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

1212102212100 is a wasteful number, since it uses less digits than its factorization.

1212102212100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39510 (or 39503 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1212102212100 its reverse (12122012121), we get a palindrome (1224224224221).

The spelling of 1212102212100 in words is "one trillion, two hundred twelve billion, one hundred two million, two hundred twelve thousand, one hundred".