20021001111200 has 36 divisors (see below), whose sum is σ = 48876268964670. Its totient is φ = 8008400444160.

The previous prime is 20021001111187. The next prime is 20021001111211. The reversal of 20021001111200 is 211110012002.

It can be written as a sum of positive squares in 3 ways, for example, as 7778587936144 + 12242413175056 = 2789012^2 + 3498916^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12513124895 + ... + 12513126494.

Almost surely, 2^{20021001111200} is an apocalyptic number.

20021001111200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021001111200 is an abundant number, since it is smaller than the sum of its proper divisors (28855267853470).

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

20021001111200 is a wasteful number, since it uses less digits than its factorization.

20021001111200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25026251409 (or 25026251396 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20021001111200 its reverse (211110012002), we get a palindrome (20232111123202).

The spelling of 20021001111200 in words is "twenty trillion, twenty-one billion, one million, one hundred eleven thousand, two hundred".