12121102110 has 64 divisors (see below), whose sum is σ = 31419021312. Its totient is φ = 2975024256.

The previous prime is 12121102093. The next prime is 12121102111. The reversal of 12121102110 is 1120112121.

It is a super-2 number, since 2×12121102110² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121102111) 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 31 ways as a sum of consecutive naturals, for example, 90547 + ... + 180113.

It is an arithmetic number, because the mean of its divisors is an integer number (490922208).

Almost surely, 2^12121102110 is an apocalyptic number.

12121102110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12121102110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15709510656).

12121102110 is an abundant number, since it is smaller than the sum of its proper divisors (19297919202).

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

12121102110 is a wasteful number, since it uses less digits than its factorization.

12121102110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89937.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12121102110 its reverse (1120112121), we get a palindrome (13241214231).

The spelling of 12121102110 in words is "twelve billion, one hundred twenty-one million, one hundred two thousand, one hundred ten".