11000021121205 has 16 divisors (see below), whose sum is σ = 13656325351680. Its totient is φ = 8495866969408.

The previous prime is 11000021121181. The next prime is 11000021121209. The reversal of 11000021121205 is 50212112000011.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11000021121205 is a prime.

It is a super-2 number, since 2×11000021121205² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11000021121209) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1362967 + ... + 4884436.

It is an arithmetic number, because the mean of its divisors is an integer number (853520334480).

Almost surely, 2^{11000021121205} is an apocalyptic number.

It is an amenable number.

11000021121205 is a deficient number, since it is larger than the sum of its proper divisors (2656304230475).

11000021121205 is a wasteful number, since it uses less digits than its factorization.

11000021121205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6259580.

The product of its (nonzero) digits is 40, while the sum is 16.

Adding to 11000021121205 its reverse (50212112000011), we get a palindrome (61212133121216).

The spelling of 11000021121205 in words is "eleven trillion, twenty-one million, one hundred twenty-one thousand, two hundred five".