20002220122121 has 8 divisors (see below), whose sum is σ = 20694204433920. Its totient is φ = 19310385982608.

The previous prime is 20002220122081. The next prime is 20002220122163. The reversal of 20002220122121 is 12122102220002.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20002220122121 - 2³⁰ = 20001146380297 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 20002220122121.

It is not an unprimeable number, because it can be changed into a prime (20002220022121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37272041 + ... + 37804886.

It is an arithmetic number, because the mean of its divisors is an integer number (2586775554240).

Almost surely, 2^{20002220122121} is an apocalyptic number.

It is an amenable number.

20002220122121 is a deficient number, since it is larger than the sum of its proper divisors (691984311799).

20002220122121 is an equidigital number, since it uses as much as digits as its factorization.

20002220122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75086143.

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

Adding to 20002220122121 its reverse (12122102220002), we get a palindrome (32124322342123).

The spelling of 20002220122121 in words is "twenty trillion, two billion, two hundred twenty million, one hundred twenty-two thousand, one hundred twenty-one".