11121220110 has 384 divisors, whose sum is σ = 36525468672. Its totient is φ = 2108620800.

The previous prime is 11121220069. The next prime is 11121220139. The reversal of 11121220110 is 1102212111.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 43273102 + ... + 43273358.

It is an arithmetic number, because the mean of its divisors is an integer number (95118408).

Almost surely, 2^11121220110 is an apocalyptic number.

11121220110 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 11121220110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18262734336).

11121220110 is an abundant number, since it is smaller than the sum of its proper divisors (25404248562).

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

11121220110 is a wasteful number, since it uses less digits than its factorization.

11121220110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440 (or 429 counting only the distinct ones).

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

Adding to 11121220110 its reverse (1102212111), we get a palindrome (12223432221).

The spelling of 11121220110 in words is "eleven billion, one hundred twenty-one million, two hundred twenty thousand, one hundred ten".