20001210120211 has 4 divisors (see below), whose sum is σ = 20016702925624. Its totient is φ = 19985717314800.

The previous prime is 20001210120191. The next prime is 20001210120247. The reversal of 20001210120211 is 11202101210002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20001210120211 - 2⁷ = 20001210120083 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20001210120191 and 20001210120200.

It is not an unprimeable number, because it can be changed into a prime (20001210120811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7746400770 + ... + 7746403351.

It is an arithmetic number, because the mean of its divisors is an integer number (5004175731406).

Almost surely, 2^{20001210120211} is an apocalyptic number.

20001210120211 is a deficient number, since it is larger than the sum of its proper divisors (15492805413).

20001210120211 is a wasteful number, since it uses less digits than its factorization.

20001210120211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15492805412.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20001210120211 its reverse (11202101210002), we get a palindrome (31203311330213).

The spelling of 20001210120211 in words is "twenty trillion, one billion, two hundred ten million, one hundred twenty thousand, two hundred eleven".