20121303120000 has 160 divisors (see below), whose sum is σ = 66787636177680. Its totient is φ = 5365680768000.

The previous prime is 20121303119989. The next prime is 20121303120019. The reversal of 20121303120000 is 2130312102.

It is a tau number, because it is divible by the number of its divisors (160).

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

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 41679382 + ... + 42159381.

Almost surely, 2^{20121303120000} is an apocalyptic number.

20121303120000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20121303120000 is an abundant number, since it is smaller than the sum of its proper divisors (46666333057680).

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

20121303120000 is an frugal number, since it uses more digits than its factorization.

20121303120000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83838800 (or 83838773 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20121303120000 its reverse (2130312102), we get a palindrome (20123433432102).

The spelling of 20121303120000 in words is "twenty trillion, one hundred twenty-one billion, three hundred three million, one hundred twenty thousand".