20001202221200 has 60 divisors (see below), whose sum is σ = 48053369100708. Its totient is φ = 8000400844800.

The previous prime is 20001202221173. The next prime is 20001202221223. The reversal of 20001202221200 is 212220210002.

It can be written as a sum of positive squares in 6 ways, for example, as 798156412816 + 19203045808384 = 893396^2 + 4382128^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55035284 + ... + 55397516.

Almost surely, 2^{20001202221200} is an apocalyptic number.

20001202221200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001202221200 is an abundant number, since it is smaller than the sum of its proper divisors (28052166879508).

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

20001202221200 is a wasteful number, since it uses less digits than its factorization.

20001202221200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500292 (or 500281 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20001202221200 its reverse (212220210002), we get a palindrome (20213422431202).

The spelling of 20001202221200 in words is "twenty trillion, one billion, two hundred two million, two hundred twenty-one thousand, two hundred".