121212221021112 has 96 divisors (see below), whose sum is σ = 329966826249600. Its totient is φ = 37087709862528.

The previous prime is 121212221021081. The next prime is 121212221021141. The reversal of 121212221021112 is 211120122212121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82750708 + ... + 84202755.

It is an arithmetic number, because the mean of its divisors is an integer number (3437154440100).

Almost surely, 2^{121212221021112} is an apocalyptic number.

121212221021112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121212221021112 is an abundant number, since it is smaller than the sum of its proper divisors (208754605228488).

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

121212221021112 is a wasteful number, since it uses less digits than its factorization.

121212221021112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166953677 (or 166953660 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 121212221021112 its reverse (211120122212121), we get a palindrome (332332343233233).

The spelling of 121212221021112 in words is "one hundred twenty-one trillion, two hundred twelve billion, two hundred twenty-one million, twenty-one thousand, one hundred twelve".