112137521 has 2 divisors, whose sum is σ = 112137522. Its totient is φ = 112137520.

The previous prime is 112137517. The next prime is 112137523. The reversal of 112137521 is 125731211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87684496 + 24453025 = 9364^2 + 4945^2 .

It is a cyclic number.

It is not a de Polignac number, because 112137521 - 2² = 112137517 is a prime.

Together with 112137523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (112137523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56068760 + 56068761.

It is an arithmetic number, because the mean of its divisors is an integer number (56068761).

Almost surely, 2^112137521 is an apocalyptic number.

It is an amenable number.

112137521 is a deficient number, since it is larger than the sum of its proper divisors (1).

112137521 is an equidigital number, since it uses as much as digits as its factorization.

112137521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 420, while the sum is 23.

The square root of 112137521 is about 10589.5005075782. The cubic root of 112137521 is about 482.2256609362.

Adding to 112137521 its reverse (125731211), we get a palindrome (237868732).

The spelling of 112137521 in words is "one hundred twelve million, one hundred thirty-seven thousand, five hundred twenty-one".