121221220002112 has 112 divisors (see below), whose sum is σ = 254197796700672. Its totient is φ = 57265371555840.

The previous prime is 121221220002059. The next prime is 121221220002119. The reversal of 121221220002112 is 211200022122121.

It is a self number, because there is not a number n which added to its sum of digits gives 121221220002112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221220002119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188474418 + ... + 189116494.

Almost surely, 2^{121221220002112} 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 121221220002112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127098898350336).

121221220002112 is an abundant number, since it is smaller than the sum of its proper divisors (132976576698560).

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

121221220002112 is a wasteful number, since it uses less digits than its factorization.

121221220002112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644376 (or 644366 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 121221220002112 its reverse (211200022122121), we get a palindrome (332421242124233).

The spelling of 121221220002112 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred twenty million, two thousand, one hundred twelve".