20201011221101 has 4 divisors (see below), whose sum is σ = 20201020322304. Its totient is φ = 20201002119900.

The previous prime is 20201011221073. The next prime is 20201011221143. The reversal of 20201011221101 is 10112211010202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20201011221101 - 2¹⁰ = 20201011220077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201011221161) 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, 1207286 + ... + 6469896.

It is an arithmetic number, because the mean of its divisors is an integer number (5050255080576).

Almost surely, 2^{20201011221101} is an apocalyptic number.

It is an amenable number.

20201011221101 is a deficient number, since it is larger than the sum of its proper divisors (9101203).

20201011221101 is an equidigital number, since it uses as much as digits as its factorization.

20201011221101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9101202.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20201011221101 its reverse (10112211010202), we get a palindrome (30313222231303).

The spelling of 20201011221101 in words is "twenty trillion, two hundred one billion, eleven million, two hundred twenty-one thousand, one hundred one".