20121300200220 has 96 divisors (see below), whose sum is σ = 58806540656640. Its totient is φ = 5130874890240.

The previous prime is 20121300200219. The next prime is 20121300200249. The reversal of 20121300200220 is 2200200312102.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20121300200220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2529676 + ... + 6829484.

It is an arithmetic number, because the mean of its divisors is an integer number (612568131840).

Almost surely, 2^{20121300200220} is an apocalyptic number.

20121300200220 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 20121300200220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29403270328320).

20121300200220 is an abundant number, since it is smaller than the sum of its proper divisors (38685240456420).

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

20121300200220 is a wasteful number, since it uses less digits than its factorization.

20121300200220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4303235 (or 4303233 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 20121300200220 its reverse (2200200312102), we get a palindrome (22321500512322).

The spelling of 20121300200220 in words is "twenty trillion, one hundred twenty-one billion, three hundred million, two hundred thousand, two hundred twenty".