20201220222101 has 8 divisors (see below), whose sum is σ = 20445224378880. Its totient is φ = 19957230731232.

The previous prime is 20201220222097. The next prime is 20201220222173. The reversal of 20201220222101 is 10122202210202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20201220222101 - 2² = 20201220222097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20201220222101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201220227101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 882296 + ... + 6417233.

It is an arithmetic number, because the mean of its divisors is an integer number (2555653047360).

Almost surely, 2^{20201220222101} is an apocalyptic number.

It is an amenable number.

20201220222101 is a deficient number, since it is larger than the sum of its proper divisors (244004156779).

20201220222101 is an equidigital number, since it uses as much as digits as its factorization.

20201220222101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7332955.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20201220222101 its reverse (10122202210202), we get a palindrome (30323422432303).

The spelling of 20201220222101 in words is "twenty trillion, two hundred one billion, two hundred twenty million, two hundred twenty-two thousand, one hundred one".