11211000020205 has 32 divisors (see below), whose sum is σ = 18262765854720. Its totient is φ = 5871046278720.

The previous prime is 11211000020189. The next prime is 11211000020221. The reversal of 11211000020205 is 50202000011211.

It is an interprime number because it is at equal distance from previous prime (11211000020189) and next prime (11211000020221).

It is not a de Polignac number, because 11211000020205 - 2⁴ = 11211000020189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6575641 + ... + 8103150.

It is an arithmetic number, because the mean of its divisors is an integer number (570711432960).

Almost surely, 2^{11211000020205} is an apocalyptic number.

11211000020205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11211000020205 is a deficient number, since it is larger than the sum of its proper divisors (7051765834515).

11211000020205 is a wasteful number, since it uses less digits than its factorization.

11211000020205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14679721.

The product of its (nonzero) digits is 40, while the sum is 15.

Adding to 11211000020205 its reverse (50202000011211), we get a palindrome (61413000031416).

The spelling of 11211000020205 in words is "eleven trillion, two hundred eleven billion, twenty thousand, two hundred five".