11111021231232 has 128 divisors (see below), whose sum is σ = 31822375556160. Its totient is φ = 3414640545792.

The previous prime is 11111021231203. The next prime is 11111021231239. The reversal of 11111021231232 is 23213212011111.

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 11111021231199 and 11111021231208.

It is not an unprimeable number, because it can be changed into a prime (11111021231239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2782698 + ... + 5474070.

Almost surely, 2^{11111021231232} is an apocalyptic number.

11111021231232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11111021231232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15911187778080).

11111021231232 is an abundant number, since it is smaller than the sum of its proper divisors (20711354324928).

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

11111021231232 is a wasteful number, since it uses less digits than its factorization.

11111021231232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2692230 (or 2692218 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 11111021231232 its reverse (23213212011111), we get a palindrome (34324233242343).

The spelling of 11111021231232 in words is "eleven trillion, one hundred eleven billion, twenty-one million, two hundred thirty-one thousand, two hundred thirty-two".