130111561 has 2 divisors, whose sum is σ = 130111562. Its totient is φ = 130111560.

The previous prime is 130111543. The next prime is 130111571. The reversal of 130111561 is 165111031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89661961 + 40449600 = 9469^2 + 6360^2 .

It is a cyclic number.

It is not a de Polignac number, because 130111561 - 2¹⁹ = 129587273 is a prime.

It is not a weakly prime, because it can be changed into another prime (130111571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65055780 + 65055781.

It is an arithmetic number, because the mean of its divisors is an integer number (65055781).

Almost surely, 2^130111561 is an apocalyptic number.

It is an amenable number.

130111561 is a deficient number, since it is larger than the sum of its proper divisors (1).

130111561 is an equidigital number, since it uses as much as digits as its factorization.

130111561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90, while the sum is 19.

The square root of 130111561 is about 11406.6454753359. The cubic root of 130111561 is about 506.7245695502.

Adding to 130111561 its reverse (165111031), we get a palindrome (295222592).

The spelling of 130111561 in words is "one hundred thirty million, one hundred eleven thousand, five hundred sixty-one".