12101212210020 has 192 divisors, whose sum is σ = 35143266686976. Its totient is φ = 3108784250880.

The previous prime is 12101212210019. The next prime is 12101212210027. The reversal of 12101212210020 is 2001221210121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (12101212210027) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 248577922 + ... + 248626598.

It is an arithmetic number, because the mean of its divisors is an integer number (183037847328).

Almost surely, 2^{12101212210020} is an apocalyptic number.

12101212210020 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 12101212210020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17571633343488).

12101212210020 is an abundant number, since it is smaller than the sum of its proper divisors (23042054476956).

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

12101212210020 is a wasteful number, since it uses less digits than its factorization.

12101212210020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49830 (or 49828 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12101212210020 its reverse (2001221210121), we get a palindrome (14102433420141).

The spelling of 12101212210020 in words is "twelve trillion, one hundred one billion, two hundred twelve million, two hundred ten thousand, twenty".