12101001200020 has 144 divisors (see below), whose sum is σ = 26965431360000. Its totient is φ = 4559783155200.

The previous prime is 12101001199993. The next prime is 12101001200039. The reversal of 12101001200020 is 2000210010121.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 107748856 + ... + 107861104.

It is an arithmetic number, because the mean of its divisors is an integer number (187259940000).

Almost surely, 2^{12101001200020} is an apocalyptic number.

12101001200020 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 12101001200020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13482715680000).

12101001200020 is an abundant number, since it is smaller than the sum of its proper divisors (14864430159980).

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

12101001200020 is a wasteful number, since it uses less digits than its factorization.

12101001200020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112470 (or 112437 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 12101001200020 its reverse (2000210010121), we get a palindrome (14101211210141).

The spelling of 12101001200020 in words is "twelve trillion, one hundred one billion, one million, two hundred thousand, twenty".