20021120212211 has 8 divisors (see below), whose sum is σ = 20109983637360. Its totient is φ = 19932384375072.

The previous prime is 20021120212199. The next prime is 20021120212213. The reversal of 20021120212211 is 11221202112002.

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 20021120212211 - 2¹⁰ = 20021120211187 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 20021120212211.

It is not an unprimeable number, because it can be changed into a prime (20021120212213) 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, 31582460 + ... + 32210153.

It is an arithmetic number, because the mean of its divisors is an integer number (2513747954670).

Almost surely, 2^{20021120212211} is an apocalyptic number.

20021120212211 is a deficient number, since it is larger than the sum of its proper divisors (88863425149).

20021120212211 is a wasteful number, since it uses less digits than its factorization.

20021120212211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63794005.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20021120212211 its reverse (11221202112002), we get a palindrome (31242322324213).

The spelling of 20021120212211 in words is "twenty trillion, twenty-one billion, one hundred twenty million, two hundred twelve thousand, two hundred eleven".