111000061 has 2 divisors, whose sum is σ = 111000062. Its totient is φ = 111000060.

The previous prime is 111000031. The next prime is 111000101. The reversal of 111000061 is 160000111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90839961 + 20160100 = 9531^2 + 4490^2 .

It is a cyclic number.

It is not a de Polignac number, because 111000061 - 2⁹ = 110999549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111000031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55500030 + 55500031.

It is an arithmetic number, because the mean of its divisors is an integer number (55500031).

Almost surely, 2^111000061 is an apocalyptic number.

It is an amenable number.

111000061 is a deficient number, since it is larger than the sum of its proper divisors (1).

111000061 is an equidigital number, since it uses as much as digits as its factorization.

111000061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 111000061 is about 10535.6566477842. The cubic root of 111000061 is about 480.5896414064.

Adding to 111000061 its reverse (160000111), we get a palindrome (271000172).

Subtracting 111000061 from its reverse (160000111), we obtain a triangular number (49000050 = T₉₈₉₉).

The spelling of 111000061 in words is "one hundred eleven million, sixty-one", and thus it is an aban number.