121112011044 has 72 divisors (see below), whose sum is σ = 312962620152. Its totient is φ = 39479201280.

The previous prime is 121112011043. The next prime is 121112011051. The reversal of 121112011044 is 440110211121.

It can be written as a sum of positive squares in 4 ways, for example, as 5294308644 + 115817702400 = 72762^2 + 340320^2 .

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 (121112011043) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 220512 + ... + 539304.

Almost surely, 2^121112011044 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121112011044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156481310076).

121112011044 is an abundant number, since it is smaller than the sum of its proper divisors (191850609108).

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

121112011044 is a wasteful number, since it uses less digits than its factorization.

121112011044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319037 (or 319032 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 121112011044 its reverse (440110211121), we get a palindrome (561222222165).

The spelling of 121112011044 in words is "one hundred twenty-one billion, one hundred twelve million, eleven thousand, forty-four".