111421104517 has 2 divisors, whose sum is σ = 111421104518. Its totient is φ = 111421104516.

The previous prime is 111421104499. The next prime is 111421104583. The reversal of 111421104517 is 715401124111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97647500196 + 13773604321 = 312486^2 + 117361^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111421104517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111421144517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55710552258 + 55710552259.

It is an arithmetic number, because the mean of its divisors is an integer number (55710552259).

Almost surely, 2^111421104517 is an apocalyptic number.

It is an amenable number.

111421104517 is a deficient number, since it is larger than the sum of its proper divisors (1).

111421104517 is an equidigital number, since it uses as much as digits as its factorization.

111421104517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 28.

Adding to 111421104517 its reverse (715401124111), we get a palindrome (826822228628).

The spelling of 111421104517 in words is "one hundred eleven billion, four hundred twenty-one million, one hundred four thousand, five hundred seventeen".