12111011011220 has 48 divisors (see below), whose sum is σ = 28951539378048. Its totient is φ = 4212525567360.

The previous prime is 12111011011207. The next prime is 12111011011241. The reversal of 12111011011220 is 2211011011121.

It is a junction number, because it is equal to n+sod(n) for n = 12111011011195 and 12111011011204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1196735159 + ... + 1196745278.

It is an arithmetic number, because the mean of its divisors is an integer number (603157070376).

Almost surely, 2^{12111011011220} is an apocalyptic number.

12111011011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12111011011220 is an abundant number, since it is smaller than the sum of its proper divisors (16840528366828).

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

12111011011220 is a wasteful number, since it uses less digits than its factorization.

12111011011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2393480480 (or 2393480478 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 12111011011220 its reverse (2211011011121), we get a palindrome (14322022022341).

Subtracting from 12111011011220 its reverse (2211011011121), we obtain a palindrome (9900000000099).

The spelling of 12111011011220 in words is "twelve trillion, one hundred eleven billion, eleven million, eleven thousand, two hundred twenty".