121112110 has 64 divisors (see below), whose sum is σ = 255871872. Its totient is φ = 40421376.

The previous prime is 121112107. The next prime is 121112111. The reversal of 121112110 is 11211121.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121112111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 699984 + ... + 700156.

It is an arithmetic number, because the mean of its divisors is an integer number (3997998).

Almost surely, 2^121112110 is an apocalyptic number.

121112110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121112110 is an abundant number, since it is smaller than the sum of its proper divisors (134759762).

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

121112110 is a wasteful number, since it uses less digits than its factorization.

121112110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 121112110 is about 11005.0947292606. The cubic root of 121112110 is about 494.7614536075.

Adding to 121112110 its reverse (11211121), we get a palindrome (132323231).

The spelling of 121112110 in words is "one hundred twenty-one million, one hundred twelve thousand, one hundred ten".