121102121121212 has 192 divisors, whose sum is σ = 269946166081536. Its totient is φ = 46171147530240.

The previous prime is 121102121121199. The next prime is 121102121121221. The reversal of 121102121121212 is 212121121201121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6151365233 + ... + 6151384919.

It is an arithmetic number, because the mean of its divisors is an integer number (1405969615008).

Almost surely, 2^{121102121121212} 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 121102121121212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134973083040768).

121102121121212 is an abundant number, since it is smaller than the sum of its proper divisors (148844044960324).

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

121102121121212 is a wasteful number, since it uses less digits than its factorization.

121102121121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21916 (or 21914 counting only the distinct ones).

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

Adding to 121102121121212 its reverse (212121121201121), we get a palindrome (333223242322333).

The spelling of 121102121121212 in words is "one hundred twenty-one trillion, one hundred two billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred twelve".