20020222110121 has 4 divisors (see below), whose sum is σ = 20348422472644. Its totient is φ = 19692021747600.

The previous prime is 20020222110113. The next prime is 20020222110139. The reversal of 20020222110121 is 12101122202002.

It is a happy number.

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 10111350627225 + 9908871482896 = 3179835^2 + 3147836^2 .

It is a cyclic number.

It is not a de Polignac number, because 20020222110121 - 2³ = 20020222110113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20020222110095 and 20020222110104.

It is not an unprimeable number, because it can be changed into a prime (20020222110151) 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, 164100181170 + ... + 164100181291.

It is an arithmetic number, because the mean of its divisors is an integer number (5087105618161).

Almost surely, 2^{20020222110121} is an apocalyptic number.

It is an amenable number.

20020222110121 is a deficient number, since it is larger than the sum of its proper divisors (328200362523).

20020222110121 is an equidigital number, since it uses as much as digits as its factorization.

20020222110121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328200362522.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20020222110121 its reverse (12101122202002), we get a palindrome (32121344312123).

The spelling of 20020222110121 in words is "twenty trillion, twenty billion, two hundred twenty-two million, one hundred ten thousand, one hundred twenty-one".