12101220111000 has 256 divisors, whose sum is σ = 38942738789760. Its totient is φ = 3126293913600.

The previous prime is 12101220110911. The next prime is 12101220111007. The reversal of 12101220111000 is 11102210121.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101220111007) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 25629052 + ... + 26096948.

Almost surely, 2^{12101220111000} is an apocalyptic number.

12101220111000 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 12101220111000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19471369394880).

12101220111000 is an abundant number, since it is smaller than the sum of its proper divisors (26841518678760).

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

12101220111000 is a wasteful number, since it uses less digits than its factorization.

12101220111000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468191 (or 468177 counting only the distinct ones).

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

Adding to 12101220111000 its reverse (11102210121), we get a palindrome (12112322321121).

The spelling of 12101220111000 in words is "twelve trillion, one hundred one billion, two hundred twenty million, one hundred eleven thousand".