20202220102121 has 4 divisors (see below), whose sum is σ = 20202480186000. Its totient is φ = 20201960018244.

The previous prime is 20202220102117. The next prime is 20202220102151. The reversal of 20202220102121 is 12120102220202.

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 20202220102121 - 2² = 20202220102117 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 20202220102121.

It is not an unprimeable number, because it can be changed into a prime (20202220102151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129925391 + ... + 130080788.

It is an arithmetic number, because the mean of its divisors is an integer number (5050620046500).

Almost surely, 2^{20202220102121} is an apocalyptic number.

It is an amenable number.

20202220102121 is a deficient number, since it is larger than the sum of its proper divisors (260083879).

20202220102121 is an equidigital number, since it uses as much as digits as its factorization.

20202220102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260083878.

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

Adding to 20202220102121 its reverse (12120102220202), we get a palindrome (32322322322323).

The spelling of 20202220102121 in words is "twenty trillion, two hundred two billion, two hundred twenty million, one hundred two thousand, one hundred twenty-one".