121110121110 has 128 divisors (see below), whose sum is σ = 321132791808. Its totient is φ = 28987200000.

The previous prime is 121110121061. The next prime is 121110121147. The reversal of 121110121110 is 11121011121.

It is a super-2 number, since 2×121110121110² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 12227160 + ... + 12237060.

It is an arithmetic number, because the mean of its divisors is an integer number (2508849936).

Almost surely, 2^121110121110 is an apocalyptic number.

121110121110 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 121110121110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160566395904).

121110121110 is an abundant number, since it is smaller than the sum of its proper divisors (200022670698).

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

121110121110 is a wasteful number, since it uses less digits than its factorization.

121110121110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10390.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 121110121110 its reverse (11121011121), we get a palindrome (132231132231).

The spelling of 121110121110 in words is "one hundred twenty-one billion, one hundred ten million, one hundred twenty-one thousand, one hundred ten".