20022210222121 has 4 divisors (see below), whose sum is σ = 20350443176644. Its totient is φ = 19693977267600.

The previous prime is 20022210222101. The next prime is 20022210222163. The reversal of 20022210222121 is 12122201222002.

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 3596090224896 + 16426119997225 = 1896336^2 + 4052915^2 .

It is a cyclic number.

It is not a de Polignac number, because 20022210222121 - 2¹⁷ = 20022210091049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20022210222101) 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, 164116477170 + ... + 164116477291.

It is an arithmetic number, because the mean of its divisors is an integer number (5087610794161).

Almost surely, 2^{20022210222121} is an apocalyptic number.

It is an amenable number.

20022210222121 is a deficient number, since it is larger than the sum of its proper divisors (328232954523).

20022210222121 is an equidigital number, since it uses as much as digits as its factorization.

20022210222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328232954522.

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

Adding to 20022210222121 its reverse (12122201222002), we get a palindrome (32144411444123).

The spelling of 20022210222121 in words is "twenty trillion, twenty-two billion, two hundred ten million, two hundred twenty-two thousand, one hundred twenty-one".