121111121112120 has 96 divisors (see below), whose sum is σ = 393650982270000. Its totient is φ = 32293030150656.

The previous prime is 121111121112119. The next prime is 121111121112151. The reversal of 121111121112120 is 21211121111121.

121111121112120 is a `hidden beast` number, since 1 + 211 + 111 + 211 + 12 + 120 = 666.

It is a super-2 number, since 2×121111121112120² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 121111121112093 and 121111121112102.

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, 13462245 + ... + 20578004.

Almost surely, 2^{121111121112120} is an apocalyptic number.

121111121112120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121111121112120 is an abundant number, since it is smaller than the sum of its proper divisors (272539861157880).

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

121111121112120 is a wasteful number, since it uses less digits than its factorization.

121111121112120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34050149 (or 34050142 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 18.

Adding to 121111121112120 its reverse (21211121111121), we get a palindrome (142322242223241).

Subtracting from 121111121112120 its reverse (21211121111121), we obtain a palindrome (99900000000999).

The spelling of 121111121112120 in words is "one hundred twenty-one trillion, one hundred eleven billion, one hundred twenty-one million, one hundred twelve thousand, one hundred twenty".