121221120212112 has 40 divisors (see below), whose sum is σ = 313154955862560. Its totient is φ = 40406989062400.

The previous prime is 121221120212077. The next prime is 121221120212173. The reversal of 121221120212112 is 211212021122121.

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, 69691339 + ... + 71409557.

It is an arithmetic number, because the mean of its divisors is an integer number (7828873896564).

Almost surely, 2^{121221120212112} is an apocalyptic number.

121221120212112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121221120212112 is an abundant number, since it is smaller than the sum of its proper divisors (191933835650448).

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

121221120212112 is a wasteful number, since it uses less digits than its factorization.

121221120212112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3188031 (or 3188025 counting only the distinct ones).

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

Adding to 121221120212112 its reverse (211212021122121), we get a palindrome (332433141334233).

The spelling of 121221120212112 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, one hundred twenty million, two hundred twelve thousand, one hundred twelve".