11131031221123 has 12 divisors (see below), whose sum is σ = 12954637213560. Its totient is φ = 9523876978880.

The previous prime is 11131031221109. The next prime is 11131031221133. The reversal of 11131031221123 is 32112213013111.

11131031221123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-11131031221123 is a prime.

It is a super-2 number, since 2×11131031221123² (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 = 11131031221094 and 11131031221103.

It is not an unprimeable number, because it can be changed into a prime (11131031221133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2705644813 + ... + 2705648926.

It is an arithmetic number, because the mean of its divisors is an integer number (1079553101130).

Almost surely, 2^{11131031221123} is an apocalyptic number.

11131031221123 is a deficient number, since it is larger than the sum of its proper divisors (1823605992437).

11131031221123 is a wasteful number, since it uses less digits than its factorization.

11131031221123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5411293778 (or 5411293767 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 11131031221123 its reverse (32112213013111), we get a palindrome (43243244234234).

The spelling of 11131031221123 in words is "eleven trillion, one hundred thirty-one billion, thirty-one million, two hundred twenty-one thousand, one hundred twenty-three".