121112100121100 has 72 divisors (see below), whose sum is σ = 286934922750000. Its totient is φ = 44005502361600.

The previous prime is 121112100121087. The next prime is 121112100121123. The reversal of 121112100121100 is 1121001211121.

It is a super-3 number, since 3×121112100121100³ (a number of 43 digits) contains 333 as substring.

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 23 ways as a sum of consecutive naturals, for example, 42702125 + ... + 45449924.

Almost surely, 2^{121112100121100} is an apocalyptic number.

121112100121100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121112100121100 is an abundant number, since it is smaller than the sum of its proper divisors (165822822628900).

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

121112100121100 is a wasteful number, since it uses less digits than its factorization.

121112100121100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88153323 (or 88153316 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 121112100121100 its reverse (1121001211121), we get a palindrome (122233101332221).

The spelling of 121112100121100 in words is "one hundred twenty-one trillion, one hundred twelve billion, one hundred million, one hundred twenty-one thousand, one hundred".