12101111022220 has 192 divisors, whose sum is σ = 28513072465920. Its totient is φ = 4276952064000.

The previous prime is 12101111022167. The next prime is 12101111022229. The reversal of 12101111022220 is 2222011110121.

It is a junction number, because it is equal to n+sod(n) for n = 12101111022194 and 12101111022203.

It is not an unprimeable number, because it can be changed into a prime (12101111022229) 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, 534513661 + ... + 534536299.

It is an arithmetic number, because the mean of its divisors is an integer number (148505585760).

Almost surely, 2^{12101111022220} is an apocalyptic number.

12101111022220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12101111022220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14256536232960).

12101111022220 is an abundant number, since it is smaller than the sum of its proper divisors (16411961443700).

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

12101111022220 is a wasteful number, since it uses less digits than its factorization.

12101111022220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23216 (or 23214 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12101111022220 its reverse (2222011110121), we get a palindrome (14323122132341).

The spelling of 12101111022220 in words is "twelve trillion, one hundred one billion, one hundred eleven million, twenty-two thousand, two hundred twenty".