12101120021100 has 144 divisors (see below), whose sum is σ = 38201487198336. Its totient is φ = 2933147712000.

The previous prime is 12101120021057. The next prime is 12101120021183. The reversal of 12101120021100 is 112002110121.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21137832 + ... + 21702768.

It is an arithmetic number, because the mean of its divisors is an integer number (265288105544).

Almost surely, 2^{12101120021100} is an apocalyptic number.

12101120021100 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 12101120021100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19100743599168).

12101120021100 is an abundant number, since it is smaller than the sum of its proper divisors (26100367177236).

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

12101120021100 is a wasteful number, since it uses less digits than its factorization.

12101120021100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571456 (or 571449 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12101120021100 its reverse (112002110121), we get a palindrome (12213122131221).

The spelling of 12101120021100 in words is "twelve trillion, one hundred one billion, one hundred twenty million, twenty-one thousand, one hundred".