111111900029 has 4 divisors (see below), whose sum is σ = 119658969276. Its totient is φ = 102564830784.

The previous prime is 111111900001. The next prime is 111111900089. The reversal of 111111900029 is 920009111111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 920009111111 = 557 ⋅1651721923.

It can be written as a sum of positive squares in 2 ways, for example, as 5821384804 + 105290515225 = 76298^2 + 324485^2 .

It is a de Polignac number, because none of the positive numbers 2^k-111111900029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111111899980 and 111111900007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111900089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4273534604 + ... + 4273534629.

It is an arithmetic number, because the mean of its divisors is an integer number (29914742319).

Almost surely, 2^111111900029 is an apocalyptic number.

It is an amenable number.

111111900029 is a deficient number, since it is larger than the sum of its proper divisors (8547069247).

111111900029 is an equidigital number, since it uses as much as digits as its factorization.

111111900029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8547069246.

The product of its (nonzero) digits is 162, while the sum is 26.

The spelling of 111111900029 in words is "one hundred eleven billion, one hundred eleven million, nine hundred thousand, twenty-nine".