20111012210 has 8 divisors (see below), whose sum is σ = 36199821996. Its totient is φ = 8044404880.

The previous prime is 20111012197. The next prime is 20111012221. The reversal of 20111012210 is 1221011102.

It can be written as a sum of positive squares in 2 ways, for example, as 19989152689 + 121859521 = 141383^2 + 11039^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20111012210² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20111012191 and 20111012200.

It is an unprimeable number.

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, 1005550601 + ... + 1005550620.

Almost surely, 2^20111012210 is an apocalyptic number.

20111012210 is a deficient number, since it is larger than the sum of its proper divisors (16088809786).

20111012210 is a wasteful number, since it uses less digits than its factorization.

20111012210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2011101228.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20111012210 its reverse (1221011102), we get a palindrome (21332023312).

The spelling of 20111012210 in words is "twenty billion, one hundred eleven million, twelve thousand, two hundred ten".