20120221102200 has 96 divisors (see below), whose sum is σ = 63395188571760. Its totient is φ = 5277435033600.

The previous prime is 20120221102199. The next prime is 20120221102237. The reversal of 20120221102200 is 220112202102.

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 20120221102200.

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 23 ways as a sum of consecutive naturals, for example, 274829809 + ... + 274903008.

Almost surely, 2^{20120221102200} is an apocalyptic number.

20120221102200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20120221102200 is an abundant number, since it is smaller than the sum of its proper divisors (43274967469560).

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

20120221102200 is a wasteful number, since it uses less digits than its factorization.

20120221102200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549732897 (or 549732888 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20120221102200 its reverse (220112202102), we get a palindrome (20340333304302).

The spelling of 20120221102200 in words is "twenty trillion, one hundred twenty billion, two hundred twenty-one million, one hundred two thousand, two hundred".