12110021220 has 144 divisors (see below), whose sum is σ = 37436031360. Its totient is φ = 2922754560.

The previous prime is 12110021171. The next prime is 12110021221. The reversal of 12110021220 is 2212001121.

It is a super-2 number, since 2×12110021220² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 12110021196 and 12110021205.

It is not an unprimeable number, because it can be changed into a prime (12110021221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1688001 + ... + 1695159.

It is an arithmetic number, because the mean of its divisors is an integer number (259972440).

Almost surely, 2^12110021220 is an apocalyptic number.

12110021220 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 12110021220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18718015680).

12110021220 is an abundant number, since it is smaller than the sum of its proper divisors (25326010140).

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

12110021220 is a wasteful number, since it uses less digits than its factorization.

12110021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7426 (or 7413 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12110021220 its reverse (2212001121), we get a palindrome (14322022341).

The spelling of 12110021220 in words is "twelve billion, one hundred ten million, twenty-one thousand, two hundred twenty".