112101021 has 12 divisors (see below), whose sum is σ = 162042972.
Its totient is φ = 74678976.
The previous prime is 112101013. The next prime is 112101049. The reversal of 112101021 is 120101211.
Adding to 112101021 its reverse (120101211), we get a palindrome (232202232).
It is a happy number.
It can be written as a sum of positive squares in 2 ways, for example, as 75012921 + 37088100 = 8661^2 + 6090^2
It is not a de Polignac number, because 112101021 - 23 = 112101013 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (9).
It is a junction number, because it is equal to n+sod(n) for n = 112100994 and 112101012.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (112101061) by changing a digit.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11155 + ... + 18671.
It is an arithmetic number, because the mean of its divisors is an integer number (13503581).
Almost surely, 2112101021 is an apocalyptic number.
It is an amenable number.
112101021 is a deficient number, since it is larger than the sum of its proper divisors (49941951).
112101021 is a wasteful number, since it uses less digits than its factorization.
112101021 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 9180 (or 9177 counting only the distinct ones).
The product of its (nonzero) digits is 4, while the sum is 9.
The square root of 112101021 is about 10587.7769621389.
The cubic root of 112101021 is about 482.1733348682.
The spelling of 112101021 in words is "one hundred twelve million, one hundred one thousand, twenty-one".