20010111101210 has 8 divisors (see below), whose sum is σ = 36018199982196. Its totient is φ = 8004044440480.

The previous prime is 20010111101203. The next prime is 20010111101213. The reversal of 20010111101210 is 1210111101002.

It can be written as a sum of positive squares in 2 ways, for example, as 19865036194441 + 145074906769 = 4457021^2 + 380887^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 20010111101191 and 20010111101200.

It is not an unprimeable number, because it can be changed into a prime (20010111101213) 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, 1000505555051 + ... + 1000505555070.

Almost surely, 2^{20010111101210} is an apocalyptic number.

20010111101210 is a deficient number, since it is larger than the sum of its proper divisors (16008088880986).

20010111101210 is a wasteful number, since it uses less digits than its factorization.

20010111101210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2001011110128.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 20010111101210 its reverse (1210111101002), we get a palindrome (21220222202212).

The spelling of 20010111101210 in words is "twenty trillion, ten billion, one hundred eleven million, one hundred one thousand, two hundred ten".