111520061 has 2 divisors, whose sum is σ = 111520062. Its totient is φ = 111520060.

The previous prime is 111520037. The next prime is 111520069. The reversal of 111520061 is 160025111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85192900 + 26327161 = 9230^2 + 5131^2 .

It is a cyclic number.

It is not a de Polignac number, because 111520061 - 2⁶ = 111519997 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111520069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55760030 + 55760031.

It is an arithmetic number, because the mean of its divisors is an integer number (55760031).

Almost surely, 2^111520061 is an apocalyptic number.

It is an amenable number.

111520061 is a deficient number, since it is larger than the sum of its proper divisors (1).

111520061 is an equidigital number, since it uses as much as digits as its factorization.

111520061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 111520061 is about 10560.3059141296. The cubic root of 111520061 is about 481.3389424411.

Adding to 111520061 its reverse (160025111), we get a palindrome (271545172).

The spelling of 111520061 in words is "one hundred eleven million, five hundred twenty thousand, sixty-one".