11121122011231 has 4 divisors (see below), whose sum is σ = 11134868763600. Its totient is φ = 11107375258864.

The previous prime is 11121122011229. The next prime is 11121122011271. The reversal of 11121122011231 is 13211022112111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11121122011231 - 2¹ = 11121122011229 is a prime.

It is a super-2 number, since 2×11121122011231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11121122011199 and 11121122011208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121122011271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6873374971 + ... + 6873376588.

It is an arithmetic number, because the mean of its divisors is an integer number (2783717190900).

Almost surely, 2^{11121122011231} is an apocalyptic number.

11121122011231 is a deficient number, since it is larger than the sum of its proper divisors (13746752369).

11121122011231 is an equidigital number, since it uses as much as digits as its factorization.

11121122011231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13746752368.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 11121122011231 its reverse (13211022112111), we get a palindrome (24332144123342).

The spelling of 11121122011231 in words is "eleven trillion, one hundred twenty-one billion, one hundred twenty-two million, eleven thousand, two hundred thirty-one".