11111021231230 has 32 divisors (see below), whose sum is σ = 21444353735040. Its totient is φ = 4130023672320.

The previous prime is 11111021231203. The next prime is 11111021231239. The reversal of 11111021231230 is 3213212011111.

It is a junction number, because it is equal to n+sod(n) for n = 11111021231198 and 11111021231207.

It is a congruent number.

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, 413650801 + ... + 413677660.

It is an arithmetic number, because the mean of its divisors is an integer number (670136054220).

Almost surely, 2^{11111021231230} is an apocalyptic number.

11111021231230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11111021231230 is a deficient number, since it is larger than the sum of its proper divisors (10333332503810).

11111021231230 is a wasteful number, since it uses less digits than its factorization.

11111021231230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827328564.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 11111021231230 its reverse (3213212011111), we get a palindrome (14324233242341).

The spelling of 11111021231230 in words is "eleven trillion, one hundred eleven billion, twenty-one million, two hundred thirty-one thousand, two hundred thirty".