20221210222221 has 4 divisors (see below), whose sum is σ = 26961613629632. Its totient is φ = 13480806814812.

The previous prime is 20221210222177. The next prime is 20221210222231. The reversal of 20221210222221 is 12222201212202.

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 not a de Polignac number, because 20221210222221 - 2³⁴ = 20204030353037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221210222231) 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, 3370201703701 + ... + 3370201703706.

It is an arithmetic number, because the mean of its divisors is an integer number (6740403407408).

Almost surely, 2^{20221210222221} is an apocalyptic number.

It is an amenable number.

20221210222221 is a deficient number, since it is larger than the sum of its proper divisors (6740403407411).

20221210222221 is an equidigital number, since it uses as much as digits as its factorization.

20221210222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6740403407410.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 20221210222221 its reverse (12222201212202), we get a palindrome (32443411434423).

The spelling of 20221210222221 in words is "twenty trillion, two hundred twenty-one billion, two hundred ten million, two hundred twenty-two thousand, two hundred twenty-one".