11112421123 has 2 divisors, whose sum is σ = 11112421124. Its totient is φ = 11112421122.

The previous prime is 11112421091. The next prime is 11112421141. The reversal of 11112421123 is 32112421111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11112421123 - 2⁵ = 11112421091 is a prime.

It is a super-2 number, since 2×11112421123² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11112421123.

It is not a weakly prime, because it can be changed into another prime (11112421163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5556210561 + 5556210562.

It is an arithmetic number, because the mean of its divisors is an integer number (5556210562).

Almost surely, 2^11112421123 is an apocalyptic number.

11112421123 is a deficient number, since it is larger than the sum of its proper divisors (1).

11112421123 is an equidigital number, since it uses as much as digits as its factorization.

11112421123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96, while the sum is 19.

Adding to 11112421123 its reverse (32112421111), we get a palindrome (43224842234).

The spelling of 11112421123 in words is "eleven billion, one hundred twelve million, four hundred twenty-one thousand, one hundred twenty-three".