20201022111211 has 4 divisors (see below), whose sum is σ = 20693729967624. Its totient is φ = 19708314254800.

The previous prime is 20201022111199. The next prime is 20201022111241. The reversal of 20201022111211 is 11211122010202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20201022111211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20201022111241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246353928145 + ... + 246353928226.

It is an arithmetic number, because the mean of its divisors is an integer number (5173432491906).

Almost surely, 2^{20201022111211} is an apocalyptic number.

20201022111211 is a deficient number, since it is larger than the sum of its proper divisors (492707856413).

20201022111211 is an equidigital number, since it uses as much as digits as its factorization.

20201022111211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492707856412.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20201022111211 its reverse (11211122010202), we get a palindrome (31412144121413).

The spelling of 20201022111211 in words is "twenty trillion, two hundred one billion, twenty-two million, one hundred eleven thousand, two hundred eleven".