12011122021110 has 128 divisors (see below), whose sum is σ = 30208257054720. Its totient is φ = 3050667518976.

The previous prime is 12011122021099. The next prime is 12011122021111. The reversal of 12011122021110 is 1112022111021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 12011122021110.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011122021111) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 200982994 + ... + 201042746.

It is an arithmetic number, because the mean of its divisors is an integer number (236002008240).

Almost surely, 2^{12011122021110} is an apocalyptic number.

12011122021110 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 12011122021110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15104128527360).

12011122021110 is an abundant number, since it is smaller than the sum of its proper divisors (18197135033610).

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

12011122021110 is a wasteful number, since it uses less digits than its factorization.

12011122021110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61022.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 12011122021110 its reverse (1112022111021), we get a palindrome (13123144132131).

The spelling of 12011122021110 in words is "twelve trillion, eleven billion, one hundred twenty-two million, twenty-one thousand, one hundred ten".