121010112 has 168 divisors, whose sum is σ = 372782592. Its totient is φ = 38880000.

The previous prime is 121010083. The next prime is 121010117. The reversal of 121010112 is 211010121.

It is a happy number.

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 = 121010094 and 121010103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121010117) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 481987 + ... + 482237.

It is an arithmetic number, because the mean of its divisors is an integer number (2218944).

Almost surely, 2^121010112 is an apocalyptic number.

121010112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121010112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186391296).

121010112 is an abundant number, since it is smaller than the sum of its proper divisors (251772480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121010112 is an equidigital number, since it uses as much as digits as its factorization.

121010112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 121010112 is about 11000.4596267611. The cubic root of 121010112 is about 494.6225221329.

Adding to 121010112 its reverse (211010121), we get a palindrome (332020233).

Subtracting 121010112 from its reverse (211010121), we obtain a palindrome (90000009).

The spelling of 121010112 in words is "one hundred twenty-one million, ten thousand, one hundred twelve".