121111012121112 has 96 divisors (see below), whose sum is σ = 371832054812400. Its totient is φ = 35303614864128.

The previous prime is 121111012120999. The next prime is 121111012121119. The reversal of 121111012121112 is 211121210111121.

121111012121112 is a `hidden beast` number, since 1 + 211 + 110 + 121 + 211 + 12 = 666.

It is a super-2 number, since 2×121111012121112² (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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (121111012121119) by changing a digit.

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, 3405037663 + ... + 3405073230.

Almost surely, 2^{121111012121112} is an apocalyptic number.

121111012121112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121111012121112 is an abundant number, since it is smaller than the sum of its proper divisors (250721042691288).

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

121111012121112 is a wasteful number, since it uses less digits than its factorization.

121111012121112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6810110937 (or 6810110930 counting only the distinct ones).

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

Adding to 121111012121112 its reverse (211121210111121), we get a palindrome (332232222232233).

The spelling of 121111012121112 in words is "one hundred twenty-one trillion, one hundred eleven billion, twelve million, one hundred twenty-one thousand, one hundred twelve".