121311311112 has 48 divisors (see below), whose sum is σ = 345843654000. Its totient is φ = 38308834656.

The previous prime is 121311311047. The next prime is 121311311123. The reversal of 121311311112 is 211113113121.

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

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44337562 + ... + 44340297.

It is an arithmetic number, because the mean of its divisors is an integer number (7205076125).

Almost surely, 2^121311311112 is an apocalyptic number.

121311311112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121311311112 is an abundant number, since it is smaller than the sum of its proper divisors (224532342888).

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

121311311112 is a wasteful number, since it uses less digits than its factorization.

121311311112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88677890 (or 88677883 counting only the distinct ones).

The product of its digits is 36, while the sum is 18.

Adding to 121311311112 its reverse (211113113121), we get a palindrome (332424424233).

The spelling of 121311311112 in words is "one hundred twenty-one billion, three hundred eleven million, three hundred eleven thousand, one hundred twelve".