20002012220121 has 4 divisors (see below), whose sum is σ = 26669349626832. Its totient is φ = 13334674813412.

The previous prime is 20002012220117. The next prime is 20002012220131. The reversal of 20002012220121 is 12102221020002.

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 20002012220121 - 2² = 20002012220117 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 20002012220121.

It is not an unprimeable number, because it can be changed into a prime (20002012220131) 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, 3333668703351 + ... + 3333668703356.

It is an arithmetic number, because the mean of its divisors is an integer number (6667337406708).

Almost surely, 2^{20002012220121} is an apocalyptic number.

It is an amenable number.

20002012220121 is a deficient number, since it is larger than the sum of its proper divisors (6667337406711).

20002012220121 is an equidigital number, since it uses as much as digits as its factorization.

20002012220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6667337406710.

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

Adding to 20002012220121 its reverse (12102221020002), we get a palindrome (32104233240123).

The spelling of 20002012220121 in words is "twenty trillion, two billion, twelve million, two hundred twenty thousand, one hundred twenty-one".