20102111122210 has 24 divisors (see below), whose sum is σ = 39181274581140. Its totient is φ = 7422317952192.

The previous prime is 20102111122199. The next prime is 20102111122211. The reversal of 20102111122210 is 1222111120102.

It can be written as a sum of positive squares in 6 ways, for example, as 1896947026209 + 18205164096001 = 1377297^2 + 4266751^2 .

It is not an unprimeable number, because it can be changed into a prime (20102111122211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5947368465 + ... + 5947371844.

Almost surely, 2^{20102111122210} is an apocalyptic number.

20102111122210 is a deficient number, since it is larger than the sum of its proper divisors (19079163458930).

20102111122210 is a wasteful number, since it uses less digits than its factorization.

20102111122210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11894740342 (or 11894740329 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20102111122210 its reverse (1222111120102), we get a palindrome (21324222242312).

The spelling of 20102111122210 in words is "twenty trillion, one hundred two billion, one hundred eleven million, one hundred twenty-two thousand, two hundred ten".