111111000061 has 2 divisors, whose sum is σ = 111111000062. Its totient is φ = 111111000060.

The previous prime is 111111000041. The next prime is 111111000101. The reversal of 111111000061 is 160000111111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61824336025 + 49286664036 = 248645^2 + 222006^2 .

It is a cyclic number.

It is not a de Polignac number, because 111111000061 - 2¹¹ = 111110998013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111111000041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555500030 + 55555500031.

It is an arithmetic number, because the mean of its divisors is an integer number (55555500031).

Almost surely, 2^111111000061 is an apocalyptic number.

It is an amenable number.

111111000061 is a deficient number, since it is larger than the sum of its proper divisors (1).

111111000061 is an equidigital number, since it uses as much as digits as its factorization.

111111000061 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 13.

Adding to 111111000061 its reverse (160000111111), we get a palindrome (271111111172).

The spelling of 111111000061 in words is "one hundred eleven billion, one hundred eleven million, sixty-one", and thus it is an aban number.