112005111521 has 2 divisors, whose sum is σ = 112005111522. Its totient is φ = 112005111520.

The previous prime is 112005111497. The next prime is 112005111553. The reversal of 112005111521 is 125111500211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68256787600 + 43748323921 = 261260^2 + 209161^2 .

It is a cyclic number.

It is not a de Polignac number, because 112005111521 - 2³⁰ = 110931369697 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 112005111493 and 112005111502.

It is not a weakly prime, because it can be changed into another prime (112005111721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56002555760 + 56002555761.

It is an arithmetic number, because the mean of its divisors is an integer number (56002555761).

Almost surely, 2^112005111521 is an apocalyptic number.

It is an amenable number.

112005111521 is a deficient number, since it is larger than the sum of its proper divisors (1).

112005111521 is an equidigital number, since it uses as much as digits as its factorization.

112005111521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100, while the sum is 20.

Adding to 112005111521 its reverse (125111500211), we get a palindrome (237116611732).

The spelling of 112005111521 in words is "one hundred twelve billion, five million, one hundred eleven thousand, five hundred twenty-one".