121221101112 has 32 divisors (see below), whose sum is σ = 311243370000. Its totient is φ = 39314951424.

The previous prime is 121221101087. The next prime is 121221101137. The reversal of 121221101112 is 211101122121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121221101087) and next prime (121221101137).

It is a junction number, because it is equal to n+sod(n) for n = 121221101091 and 121221101100.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68254237 + ... + 68256012.

Almost surely, 2^121221101112 is an apocalyptic number.

121221101112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121221101112 is an abundant number, since it is smaller than the sum of its proper divisors (190022268888).

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

121221101112 is a wasteful number, since it uses less digits than its factorization.

121221101112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136510295 (or 136510291 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121221101112 its reverse (211101122121), we get a palindrome (332322223233).

The spelling of 121221101112 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred one thousand, one hundred twelve".