111443661029 has 2 divisors, whose sum is σ = 111443661030. Its totient is φ = 111443661028.

The previous prime is 111443661019. The next prime is 111443661031. The reversal of 111443661029 is 920166344111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91194940225 + 20248720804 = 301985^2 + 142298^2 .

It is a cyclic number.

It is not a de Polignac number, because 111443661029 - 2²⁸ = 111175225573 is a prime.

Together with 111443661031, 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 = 111443660983 and 111443661001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111443661019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55721830514 + 55721830515.

It is an arithmetic number, because the mean of its divisors is an integer number (55721830515).

Almost surely, 2^111443661029 is an apocalyptic number.

It is an amenable number.

111443661029 is a deficient number, since it is larger than the sum of its proper divisors (1).

111443661029 is an equidigital number, since it uses as much as digits as its factorization.

111443661029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 38.

The spelling of 111443661029 in words is "one hundred eleven billion, four hundred forty-three million, six hundred sixty-one thousand, twenty-nine".