20100100111211 has 4 divisors (see below), whose sum is σ = 20100122379624. Its totient is φ = 20100077842800.

The previous prime is 20100100111193. The next prime is 20100100111213. The reversal of 20100100111211 is 11211100100102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20100100111211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20100100111192 and 20100100111201.

It is not an unprimeable number, because it can be changed into a prime (20100100111213) 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, 9720425 + ... + 11605466.

It is an arithmetic number, because the mean of its divisors is an integer number (5025030594906).

Almost surely, 2^{20100100111211} is an apocalyptic number.

20100100111211 is a deficient number, since it is larger than the sum of its proper divisors (22268413).

20100100111211 is an equidigital number, since it uses as much as digits as its factorization.

20100100111211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22268412.

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

Adding to 20100100111211 its reverse (11211100100102), we get a palindrome (31311200211313).

The spelling of 20100100111211 in words is "twenty trillion, one hundred billion, one hundred million, one hundred eleven thousand, two hundred eleven".