20201100012221 has 4 divisors (see below), whose sum is σ = 20852748399744. Its totient is φ = 19549451624700.

The previous prime is 20201100012173. The next prime is 20201100012319. The reversal of 20201100012221 is 12221000110202.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20201100012221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20201100012196 and 20201100012205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201100012721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 325824193715 + ... + 325824193776.

It is an arithmetic number, because the mean of its divisors is an integer number (5213187099936).

Almost surely, 2^{20201100012221} is an apocalyptic number.

It is an amenable number.

20201100012221 is a deficient number, since it is larger than the sum of its proper divisors (651648387523).

20201100012221 is an equidigital number, since it uses as much as digits as its factorization.

20201100012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651648387522.

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

Adding to 20201100012221 its reverse (12221000110202), we get a palindrome (32422100122423).

The spelling of 20201100012221 in words is "twenty trillion, two hundred one billion, one hundred million, twelve thousand, two hundred twenty-one".