11121201205 has 8 divisors (see below), whose sum is σ = 13597242552. Its totient is φ = 8729093568.

The previous prime is 11121201193. The next prime is 11121201263. The reversal of 11121201205 is 50210212111.

It can be written as a sum of positive squares in 4 ways, for example, as 3420612196 + 7700589009 = 58486^2 + 87753^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 11121201205 - 2¹¹ = 11121199157 is a prime.

It is a super-2 number, since 2×11121201205² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20983134 + ... + 20983663.

It is an arithmetic number, because the mean of its divisors is an integer number (1699655319).

Almost surely, 2^11121201205 is an apocalyptic number.

It is an amenable number.

11121201205 is a deficient number, since it is larger than the sum of its proper divisors (2476041347).

11121201205 is an equidigital number, since it uses as much as digits as its factorization.

11121201205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41966855.

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

Adding to 11121201205 its reverse (50210212111), we get a palindrome (61331413316).

The spelling of 11121201205 in words is "eleven billion, one hundred twenty-one million, two hundred one thousand, two hundred five".