111212112026111 has 2 divisors, whose sum is σ = 111212112026112. Its totient is φ = 111212112026110.

The previous prime is 111212112026107. The next prime is 111212112026123. The reversal of 111212112026111 is 111620211212111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111212112026111 - 2² = 111212112026107 is a prime.

It is a super-2 number, since 2×111212112026111² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111212112026611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55606056013055 + 55606056013056.

It is an arithmetic number, because the mean of its divisors is an integer number (55606056013056).

Almost surely, 2^{111212112026111} is an apocalyptic number.

111212112026111 is a deficient number, since it is larger than the sum of its proper divisors (1).

111212112026111 is an equidigital number, since it uses as much as digits as its factorization.

111212112026111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 23.

Adding to 111212112026111 its reverse (111620211212111), we get a palindrome (222832323238222).

The spelling of 111212112026111 in words is "one hundred eleven trillion, two hundred twelve billion, one hundred twelve million, twenty-six thousand, one hundred eleven".