111311029 has 2 divisors, whose sum is σ = 111311030. Its totient is φ = 111311028.

The previous prime is 111311027. The next prime is 111311131. The reversal of 111311029 is 920113111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72846225 + 38464804 = 8535^2 + 6202^2 .

It is a cyclic number.

It is not a de Polignac number, because 111311029 - 2¹ = 111311027 is a prime.

Together with 111311027, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 111310997 and 111311015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111311027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55655514 + 55655515.

It is an arithmetic number, because the mean of its divisors is an integer number (55655515).

Almost surely, 2^111311029 is an apocalyptic number.

It is an amenable number.

111311029 is a deficient number, since it is larger than the sum of its proper divisors (1).

111311029 is an equidigital number, since it uses as much as digits as its factorization.

111311029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 19.

The square root of 111311029 is about 10550.4042102661. The cubic root of 111311029 is about 481.0380155033.

The spelling of 111311029 in words is "one hundred eleven million, three hundred eleven thousand, twenty-nine".