20212210222201 has 4 divisors (see below), whose sum is σ = 20219957334900. Its totient is φ = 20204463109504.

The previous prime is 20212210222159. The next prime is 20212210222229. The reversal of 20212210222201 is 10222201221202.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7976241202176 + 12235969020025 = 2824224^2 + 3497995^2 .

It is a cyclic number.

It is not a de Polignac number, because 20212210222201 - 2¹⁹ = 20212209697913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20212210222271) 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, 3873552436 + ... + 3873557653.

It is an arithmetic number, because the mean of its divisors is an integer number (5054989333725).

Almost surely, 2^{20212210222201} is an apocalyptic number.

It is an amenable number.

20212210222201 is a deficient number, since it is larger than the sum of its proper divisors (7747112699).

20212210222201 is an equidigital number, since it uses as much as digits as its factorization.

20212210222201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7747112698.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 20212210222201 its reverse (10222201221202), we get a palindrome (30434411443403).

Subtracting from 20212210222201 its reverse (10222201221202), we obtain a palindrome (9990009000999).

The spelling of 20212210222201 in words is "twenty trillion, two hundred twelve billion, two hundred ten million, two hundred twenty-two thousand, two hundred one".