20011202102221 has 16 divisors (see below), whose sum is σ = 21846500305920. Its totient is φ = 18178588517680.

The previous prime is 20011202102189. The next prime is 20011202102239. The reversal of 20011202102221 is 12220120211002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20011202102221 - 2⁵ = 20011202102189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20011202102195 and 20011202102204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011202102321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 342470010 + ... + 342528436.

It is an arithmetic number, because the mean of its divisors is an integer number (1365406269120).

Almost surely, 2^{20011202102221} is an apocalyptic number.

It is an amenable number.

20011202102221 is a deficient number, since it is larger than the sum of its proper divisors (1835298203699).

20011202102221 is a wasteful number, since it uses less digits than its factorization.

20011202102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80864.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20011202102221 its reverse (12220120211002), we get a palindrome (32231322313223).

The spelling of 20011202102221 in words is "twenty trillion, eleven billion, two hundred two million, one hundred two thousand, two hundred twenty-one".