111212114129 has 2 divisors, whose sum is σ = 111212114130. Its totient is φ = 111212114128.

The previous prime is 111212114099. The next prime is 111212114131. The reversal of 111212114129 is 921411212111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95468640400 + 15743473729 = 308980^2 + 125473^2 .

It is a cyclic number.

It is not a de Polignac number, because 111212114129 - 2¹⁶ = 111212048593 is a prime.

Together with 111212114131, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 111212114098 and 111212114107.

It is not a weakly prime, because it can be changed into another prime (111212114159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55606057064 + 55606057065.

It is an arithmetic number, because the mean of its divisors is an integer number (55606057065).

Almost surely, 2^111212114129 is an apocalyptic number.

It is an amenable number.

111212114129 is a deficient number, since it is larger than the sum of its proper divisors (1).

111212114129 is an equidigital number, since it uses as much as digits as its factorization.

111212114129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 26.

The spelling of 111212114129 in words is "one hundred eleven billion, two hundred twelve million, one hundred fourteen thousand, one hundred twenty-nine".