112130721 has 6 divisors (see below), whose sum is σ = 161966610. Its totient is φ = 74753808.

The previous prime is 112130719. The next prime is 112130741. The reversal of 112130721 is 127031211.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 94187025 + 17943696 = 9705^2 + 4236^2 .

It is not a de Polignac number, because 112130721 - 2¹ = 112130719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 112130694 and 112130703.

It is not an unprimeable number, because it can be changed into a prime (112130741) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6229476 + ... + 6229493.

It is an arithmetic number, because the mean of its divisors is an integer number (26994435).

Almost surely, 2^112130721 is an apocalyptic number.

It is an amenable number.

112130721 is a deficient number, since it is larger than the sum of its proper divisors (49835889).

112130721 is a wasteful number, since it uses less digits than its factorization.

112130721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12458975 (or 12458972 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

The square root of 112130721 is about 10589.1794299653. The cubic root of 112130721 is about 482.2159133788.

Adding to 112130721 its reverse (127031211), we get a palindrome (239161932).

The spelling of 112130721 in words is "one hundred twelve million, one hundred thirty thousand, seven hundred twenty-one".