20211020220101 has 4 divisors (see below), whose sum is σ = 20216265752172. Its totient is φ = 20205774688032.

The previous prime is 20211020220089. The next prime is 20211020220113. The reversal of 20211020220101 is 10102202011202.

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

It is an interprime number because it is at equal distance from previous prime (20211020220089) and next prime (20211020220113).

It can be written as a sum of positive squares in 2 ways, for example, as 16655589427876 + 3555430792225 = 4081126^2 + 1885585^2 .

It is a cyclic number.

It is not a de Polignac number, because 20211020220101 - 2¹⁰ = 20211020219077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211020220161) 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 3 ways as a sum of consecutive naturals, for example, 2622760256 + ... + 2622767961.

It is an arithmetic number, because the mean of its divisors is an integer number (5054066438043).

Almost surely, 2^{20211020220101} is an apocalyptic number.

It is an amenable number.

20211020220101 is a deficient number, since it is larger than the sum of its proper divisors (5245532071).

20211020220101 is an equidigital number, since it uses as much as digits as its factorization.

20211020220101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5245532070.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20211020220101 its reverse (10102202011202), we get a palindrome (30313222231303).

The spelling of 20211020220101 in words is "twenty trillion, two hundred eleven billion, twenty million, two hundred twenty thousand, one hundred one".