20100012111211 has 4 divisors (see below), whose sum is σ = 20342180931912. Its totient is φ = 19857843290512.

The previous prime is 20100012111209. The next prime is 20100012111247. The reversal of 20100012111211 is 11211121000102.

It is a happy number.

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 20100012111211 - 2¹ = 20100012111209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20100012111191 and 20100012111200.

It is not an unprimeable number, because it can be changed into a prime (20100012111271) 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, 121084410226 + ... + 121084410391.

It is an arithmetic number, because the mean of its divisors is an integer number (5085545232978).

Almost surely, 2^{20100012111211} is an apocalyptic number.

20100012111211 is a deficient number, since it is larger than the sum of its proper divisors (242168820701).

20100012111211 is an equidigital number, since it uses as much as digits as its factorization.

20100012111211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242168820700.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20100012111211 its reverse (11211121000102), we get a palindrome (31311133111313).

The spelling of 20100012111211 in words is "twenty trillion, one hundred billion, twelve million, one hundred eleven thousand, two hundred eleven".