20201021202111 has 32 divisors (see below), whose sum is σ = 28876406681088. Its totient is φ = 12528867415680.

The previous prime is 20201021202053. The next prime is 20201021202133. The reversal of 20201021202111 is 11120212010202.

It is not a de Polignac number, because 20201021202111 - 2¹⁰ = 20201021201087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201021202151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5181940 + ... + 8200886.

It is an arithmetic number, because the mean of its divisors is an integer number (902387708784).

Almost surely, 2^{20201021202111} is an apocalyptic number.

20201021202111 is a deficient number, since it is larger than the sum of its proper divisors (8675385478977).

20201021202111 is a wasteful number, since it uses less digits than its factorization.

20201021202111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3021631.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20201021202111 its reverse (11120212010202), we get a palindrome (31321233212313).

The spelling of 20201021202111 in words is "twenty trillion, two hundred one billion, twenty-one million, two hundred two thousand, one hundred eleven".