20121213300000 has 576 divisors, whose sum is σ = 68088798288000. Its totient is φ = 5199180800000.

The previous prime is 20121213299879. The next prime is 20121213300031. The reversal of 20121213300000 is 331212102.

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 95 ways as a sum of consecutive naturals, for example, 1832694511 + ... + 1832705489.

It is an arithmetic number, because the mean of its divisors is an integer number (118209719250).

Almost surely, 2^{20121213300000} is an apocalyptic number.

20121213300000 is a gapful number since it is divisible by the number (20) 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 20121213300000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34044399144000).

20121213300000 is an abundant number, since it is smaller than the sum of its proper divisors (47967584988000).

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

20121213300000 is a wasteful number, since it uses less digits than its factorization.

20121213300000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11207 (or 11179 counting only the distinct ones).

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

Adding to 20121213300000 its reverse (331212102), we get a palindrome (20121544512102).

The spelling of 20121213300000 in words is "twenty trillion, one hundred twenty-one billion, two hundred thirteen million, three hundred thousand".