111212110012123 has 2 divisors, whose sum is σ = 111212110012124. Its totient is φ = 111212110012122.

The previous prime is 111212110012051. The next prime is 111212110012139. The reversal of 111212110012123 is 321210011212111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111212110012123 - 2²⁹ = 111211573141211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111212110012123.

It is not a weakly prime, because it can be changed into another prime (111212110018123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55606055006061 + 55606055006062.

It is an arithmetic number, because the mean of its divisors is an integer number (55606055006062).

Almost surely, 2^{111212110012123} is an apocalyptic number.

111212110012123 is a deficient number, since it is larger than the sum of its proper divisors (1).

111212110012123 is an equidigital number, since it uses as much as digits as its factorization.

111212110012123 is an evil number, because the sum of its binary digits is even.

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

Adding to 111212110012123 its reverse (321210011212111), we get a palindrome (432422121224234).

The spelling of 111212110012123 in words is "one hundred eleven trillion, two hundred twelve billion, one hundred ten million, twelve thousand, one hundred twenty-three".