20210022120221 has 4 divisors (see below), whose sum is σ = 20640022590912. Its totient is φ = 19780021649532.

The previous prime is 20210022120209. The next prime is 20210022120263. The reversal of 20210022120221 is 12202122001202.

It is a happy number.

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 not a de Polignac number, because 20210022120221 - 2⁶ = 20210022120157 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 20210022120221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210022120271) 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, 215000235275 + ... + 215000235368.

It is an arithmetic number, because the mean of its divisors is an integer number (5160005647728).

Almost surely, 2^{20210022120221} is an apocalyptic number.

It is an amenable number.

20210022120221 is a deficient number, since it is larger than the sum of its proper divisors (430000470691).

20210022120221 is an equidigital number, since it uses as much as digits as its factorization.

20210022120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430000470690.

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

Adding to 20210022120221 its reverse (12202122001202), we get a palindrome (32412144121423).

The spelling of 20210022120221 in words is "twenty trillion, two hundred ten billion, twenty-two million, one hundred twenty thousand, two hundred twenty-one".