20102112211 has 4 divisors (see below), whose sum is σ = 20385240624. Its totient is φ = 19818983800.

The previous prime is 20102112197. The next prime is 20102112241. The reversal of 20102112211 is 11221120102.

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 20102112211 - 2²⁷ = 19967894483 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20102112191 and 20102112200.

It is not an unprimeable number, because it can be changed into a prime (20102112241) 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, 141564100 + ... + 141564241.

It is an arithmetic number, because the mean of its divisors is an integer number (5096310156).

Almost surely, 2^20102112211 is an apocalyptic number.

20102112211 is a deficient number, since it is larger than the sum of its proper divisors (283128413).

20102112211 is an equidigital number, since it uses as much as digits as its factorization.

20102112211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283128412.

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

Adding to 20102112211 its reverse (11221120102), we get a palindrome (31323232313).

It can be divided in two parts, 20102 and 112211, that multiplied together give a palindrome (2255665522).

The spelling of 20102112211 in words is "twenty billion, one hundred two million, one hundred twelve thousand, two hundred eleven".