20012201021200 has 120 divisors (see below), whose sum is σ = 48879579675080. Its totient is φ = 7871706316800.

The previous prime is 20012201021167. The next prime is 20012201021201. The reversal of 20012201021200 is 212010221002.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 8614365880576 + 11397835140624 = 2935024^2 + 3376068^2 .

It is not an unprimeable number, because it can be changed into a prime (20012201021201) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 100648282 + ... + 100846918.

Almost surely, 2^{20012201021200} is an apocalyptic number.

20012201021200 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 20012201021200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24439789837540).

20012201021200 is an abundant number, since it is smaller than the sum of its proper divisors (28867378653880).

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

20012201021200 is a wasteful number, since it uses less digits than its factorization.

20012201021200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202845 (or 202834 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20012201021200 its reverse (212010221002), we get a palindrome (20224211242202).

The spelling of 20012201021200 in words is "twenty trillion, twelve billion, two hundred one million, twenty-one thousand, two hundred".