121211201212112 has 160 divisors (see below), whose sum is σ = 277923438261504. Its totient is φ = 50597638963200.

The previous prime is 121211201211979. The next prime is 121211201212139. The reversal of 121211201212112 is 211212102112121.

It is a happy number.

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, 17664728 + ... + 23547080.

Almost surely, 2^{121211201212112} 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 121211201212112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138961719130752).

121211201212112 is an abundant number, since it is smaller than the sum of its proper divisors (156712237049392).

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

121211201212112 is a wasteful number, since it uses less digits than its factorization.

121211201212112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5882557 (or 5882551 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 121211201212112 its reverse (211212102112121), we get a palindrome (332423303324233).

Subtracting 121211201212112 from its reverse (211212102112121), we obtain a palindrome (90000900900009).

The spelling of 121211201212112 in words is "one hundred twenty-one trillion, two hundred eleven billion, two hundred one million, two hundred twelve thousand, one hundred twelve".