11111110221123 has 24 divisors (see below), whose sum is σ = 17583559559280. Its totient is φ = 6705104866560.

The previous prime is 11111110221091. The next prime is 11111110221131. The reversal of 11111110221123 is 32112201111111.

It is not a de Polignac number, because 11111110221123 - 2⁵ = 11111110221091 is a prime.

It is a super-2 number, since 2×11111110221123² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11111110221096 and 11111110221105.

It is not an unprimeable number, because it can be changed into a prime (11111110221193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 240821218 + ... + 240867351.

It is an arithmetic number, because the mean of its divisors is an integer number (732648314970).

Almost surely, 2^{11111110221123} is an apocalyptic number.

11111110221123 is a deficient number, since it is larger than the sum of its proper divisors (6472449338157).

11111110221123 is a wasteful number, since it uses less digits than its factorization.

11111110221123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481688819 (or 481688816 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 18.

Adding to 11111110221123 its reverse (32112201111111), we get a palindrome (43223311332234).

The spelling of 11111110221123 in words is "eleven trillion, one hundred eleven billion, one hundred ten million, two hundred twenty-one thousand, one hundred twenty-three".