111030005531 has 2 divisors, whose sum is σ = 111030005532. Its totient is φ = 111030005530.

The previous prime is 111030005503. The next prime is 111030005551. The reversal of 111030005531 is 135500030111.

It is an a-pointer prime, because the next prime (111030005551) can be obtained adding 111030005531 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111030005531 is a prime.

It is a super-2 number, since 2×111030005531² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111030005501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55515002765 + 55515002766.

It is an arithmetic number, because the mean of its divisors is an integer number (55515002766).

Almost surely, 2^111030005531 is an apocalyptic number.

111030005531 is a deficient number, since it is larger than the sum of its proper divisors (1).

111030005531 is an equidigital number, since it uses as much as digits as its factorization.

111030005531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225, while the sum is 20.

Adding to 111030005531 its reverse (135500030111), we get a palindrome (246530035642).

The spelling of 111030005531 in words is "one hundred eleven billion, thirty million, five thousand, five hundred thirty-one".