20102211211 has 4 divisors (see below), whose sum is σ = 20113525432. Its totient is φ = 20090896992.

The previous prime is 20102211203. The next prime is 20102211229. The reversal of 20102211211 is 11211220102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11211220102 = 2 ⋅5605610051.

It is a cyclic number.

It is not a de Polignac number, because 20102211211 - 2³ = 20102211203 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20102211191 and 20102211200.

It is not an unprimeable number, because it can be changed into a prime (20102211251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5654445 + ... + 5657998.

It is an arithmetic number, because the mean of its divisors is an integer number (5028381358).

Almost surely, 2^20102211211 is an apocalyptic number.

20102211211 is a deficient number, since it is larger than the sum of its proper divisors (11314221).

20102211211 is a wasteful number, since it uses less digits than its factorization.

20102211211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11314220.

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

Adding to 20102211211 its reverse (11211220102), we get a palindrome (31313431313).

The spelling of 20102211211 in words is "twenty billion, one hundred two million, two hundred eleven thousand, two hundred eleven".