121111230312 has 48 divisors (see below), whose sum is σ = 328938856740. Its totient is φ = 40256037888.

The previous prime is 121111230293. The next prime is 121111230319. The reversal of 121111230312 is 213032111121.

121111230312 is a `hidden beast` number, since 1 + 211 + 112 + 30 + 312 = 666.

121111230312 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 117255565476 + 3855664836 = 342426^2 + 62094^2 .

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

It is not an unprimeable number, because it can be changed into a prime (121111230319) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2357163 + ... + 2407994.

Almost surely, 2^121111230312 is an apocalyptic number.

121111230312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121111230312 is an abundant number, since it is smaller than the sum of its proper divisors (207827626428).

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

121111230312 is a wasteful number, since it uses less digits than its factorization.

121111230312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4765522 (or 4765515 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 121111230312 its reverse (213032111121), we get a palindrome (334143341433).

The spelling of 121111230312 in words is "one hundred twenty-one billion, one hundred eleven million, two hundred thirty thousand, three hundred twelve".