111211001123 has 2 divisors, whose sum is σ = 111211001124. Its totient is φ = 111211001122.

The previous prime is 111211001113. The next prime is 111211001171. The reversal of 111211001123 is 321100112111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111211001123 - 2⁸ = 111211000867 is a prime.

It is a super-3 number, since 3×111211001123³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 111211001098 and 111211001107.

It is not a weakly prime, because it can be changed into another prime (111211001113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55605500561 + 55605500562.

It is an arithmetic number, because the mean of its divisors is an integer number (55605500562).

Almost surely, 2^111211001123 is an apocalyptic number.

111211001123 is a deficient number, since it is larger than the sum of its proper divisors (1).

111211001123 is an equidigital number, since it uses as much as digits as its factorization.

111211001123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 111211001123 its reverse (321100112111), we get a palindrome (432311113234).

The spelling of 111211001123 in words is "one hundred eleven billion, two hundred eleven million, one thousand, one hundred twenty-three".