12111010021220 has 96 divisors (see below), whose sum is σ = 28645260844032. Its totient is φ = 4261190400000.

The previous prime is 12111010021219. The next prime is 12111010021259. The reversal of 12111010021220 is 2212001011121.

12111010021220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12111010021195 and 12111010021204.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39409760 + ... + 39715880.

It is an arithmetic number, because the mean of its divisors is an integer number (298388133792).

Almost surely, 2^{12111010021220} is an apocalyptic number.

12111010021220 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 12111010021220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14322630422016).

12111010021220 is an abundant number, since it is smaller than the sum of its proper divisors (16534250822812).

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

12111010021220 is a wasteful number, since it uses less digits than its factorization.

12111010021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311973 (or 311971 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12111010021220 its reverse (2212001011121), we get a palindrome (14323011032341).

The spelling of 12111010021220 in words is "twelve trillion, one hundred eleven billion, ten million, twenty-one thousand, two hundred twenty".