20102211220211 has 4 divisors (see below), whose sum is σ = 20116337863392. Its totient is φ = 20088084577032.

The previous prime is 20102211220177. The next prime is 20102211220219. The reversal of 20102211220211 is 11202211220102.

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 20102211220211 - 2²⁶ = 20102144111347 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 20102211220211.

It is not an unprimeable number, because it can be changed into a prime (20102211220219) 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, 7063319456 + ... + 7063322301.

It is an arithmetic number, because the mean of its divisors is an integer number (5029084465848).

Almost surely, 2^{20102211220211} is an apocalyptic number.

20102211220211 is a deficient number, since it is larger than the sum of its proper divisors (14126643181).

20102211220211 is a wasteful number, since it uses less digits than its factorization.

20102211220211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14126643180.

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

Adding to 20102211220211 its reverse (11202211220102), we get a palindrome (31304422440313).

The spelling of 20102211220211 in words is "twenty trillion, one hundred two billion, two hundred eleven million, two hundred twenty thousand, two hundred eleven".