20011220010211 has 4 divisors (see below), whose sum is σ = 20011232588400. Its totient is φ = 20011207432024.

The previous prime is 20011220010113. The next prime is 20011220010227. The reversal of 20011220010211 is 11201002211002.

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 20011220010211 - 2⁷ = 20011220010083 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20011220010191 and 20011220010200.

It is not an unprimeable number, because it can be changed into a prime (20011220410211) 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, 3486316 + ... + 7223353.

It is an arithmetic number, because the mean of its divisors is an integer number (5002808147100).

Almost surely, 2^{20011220010211} is an apocalyptic number.

20011220010211 is a deficient number, since it is larger than the sum of its proper divisors (12578189).

20011220010211 is a wasteful number, since it uses less digits than its factorization.

20011220010211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12578188.

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

Adding to 20011220010211 its reverse (11201002211002), we get a palindrome (31212222221213).

The spelling of 20011220010211 in words is "twenty trillion, eleven billion, two hundred twenty million, ten thousand, two hundred eleven".