20102102122211 has 2 divisors, whose sum is σ = 20102102122212. Its totient is φ = 20102102122210.

The previous prime is 20102102122159. The next prime is 20102102122213. The reversal of 20102102122211 is 11222120120102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20102102122211 - 2⁶ = 20102102122147 is a prime.

It is a Sophie Germain prime.

Together with 20102102122213, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20102102122211.

It is not a weakly prime, because it can be changed into another prime (20102102122213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051051061105 + 10051051061106.

It is an arithmetic number, because the mean of its divisors is an integer number (10051051061106).

Almost surely, 2^{20102102122211} is an apocalyptic number.

20102102122211 is a deficient number, since it is larger than the sum of its proper divisors (1).

20102102122211 is an equidigital number, since it uses as much as digits as its factorization.

20102102122211 is an evil number, because the sum of its binary digits is even.

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

Adding to 20102102122211 its reverse (11222120120102), we get a palindrome (31324222242313).

The spelling of 20102102122211 in words is "twenty trillion, one hundred two billion, one hundred two million, one hundred twenty-two thousand, two hundred eleven".