20002220012121 has 16 divisors (see below), whose sum is σ = 26675834938368. Its totient is φ = 13331709594000.

The previous prime is 20002220012041. The next prime is 20002220012123. The reversal of 20002220012121 is 12121002220002.

It is not a de Polignac number, because 20002220012121 - 2¹³ = 20002220003929 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20002220012121.

It is not an unprimeable number, because it can be changed into a prime (20002220012123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 263958580 + ... + 264034346.

It is an arithmetic number, because the mean of its divisors is an integer number (1667239683648).

Almost surely, 2^{20002220012121} is an apocalyptic number.

It is an amenable number.

20002220012121 is a deficient number, since it is larger than the sum of its proper divisors (6673614926247).

20002220012121 is a wasteful number, since it uses less digits than its factorization.

20002220012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95092.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20002220012121 its reverse (12121002220002), we get a palindrome (32123222232123).

The spelling of 20002220012121 in words is "twenty trillion, two billion, two hundred twenty million, twelve thousand, one hundred twenty-one".