112172121 has 20 divisors (see below), whose sum is σ = 168432000. Its totient is φ = 74394936.

The previous prime is 112172101. The next prime is 112172141. The reversal of 112172121 is 121271211.

It is an interprime number because it is at equal distance from previous prime (112172101) and next prime (112172141).

It is not a de Polignac number, because 112172121 - 2¹³ = 112163929 is a prime.

It is a super-3 number, since 3×112172121³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 112172094 and 112172103.

It is not an unprimeable number, because it can be changed into a prime (112172101) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12640 + ... + 19598.

It is an arithmetic number, because the mean of its divisors is an integer number (8421600).

Almost surely, 2^112172121 is an apocalyptic number.

It is an amenable number.

112172121 is a deficient number, since it is larger than the sum of its proper divisors (56259879).

112172121 is an equidigital number, since it uses as much as digits as its factorization.

112172121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7170 (or 7161 counting only the distinct ones).

The product of its digits is 56, while the sum is 18.

The square root of 112172121 is about 10591.1340752537. The cubic root of 112172121 is about 482.2752526993.

The spelling of 112172121 in words is "one hundred twelve million, one hundred seventy-two thousand, one hundred twenty-one".