12121100110 has 24 divisors (see below), whose sum is σ = 25380100440. Its totient is φ = 4155805584.

The previous prime is 12121100093. The next prime is 12121100111. The reversal of 12121100110 is 1100112121.

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 (12121100111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12367980 + ... + 12368959.

It is an arithmetic number, because the mean of its divisors is an integer number (1057504185).

Almost surely, 2^12121100110 is an apocalyptic number.

12121100110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12121100110 is an abundant number, since it is smaller than the sum of its proper divisors (13259000330).

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

12121100110 is a wasteful number, since it uses less digits than its factorization.

12121100110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24736960 (or 24736953 counting only the distinct ones).

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

Adding to 12121100110 its reverse (1100112121), we get a palindrome (13221212231).

The spelling of 12121100110 in words is "twelve billion, one hundred twenty-one million, one hundred thousand, one hundred ten".