1212100122112 has 80 divisors (see below), whose sum is σ = 2644084084752. Its totient is φ = 550519889920.

The previous prime is 1212100122071. The next prime is 1212100122131. The reversal of 1212100122112 is 2112210012121.

It is a super-2 number, since 2×1212100122112² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7107798 + ... + 7276330.

Almost surely, 2^{1212100122112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212100122112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1322042042376).

1212100122112 is an abundant number, since it is smaller than the sum of its proper divisors (1431983962640).

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

1212100122112 is a wasteful number, since it uses less digits than its factorization.

1212100122112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169839 (or 169823 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1212100122112 its reverse (2112210012121), we get a palindrome (3324310134233).

The spelling of 1212100122112 in words is "one trillion, two hundred twelve billion, one hundred million, one hundred twenty-two thousand, one hundred twelve".