11205821245 has 4 divisors (see below), whose sum is σ = 13446985500. Its totient is φ = 8964656992.

The previous prime is 11205821219. The next prime is 11205821257. The reversal of 11205821245 is 54212850211.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3689104644 + 7516716601 = 60738^2 + 86699^2 .

It is a cyclic number.

It is not a de Polignac number, because 11205821245 - 2⁵ = 11205821213 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1120582120 + ... + 1120582129.

It is an arithmetic number, because the mean of its divisors is an integer number (3361746375).

Almost surely, 2^11205821245 is an apocalyptic number.

It is an amenable number.

11205821245 is a deficient number, since it is larger than the sum of its proper divisors (2241164255).

11205821245 is an equidigital number, since it uses as much as digits as its factorization.

11205821245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2241164254.

The product of its (nonzero) digits is 6400, while the sum is 31.

The spelling of 11205821245 in words is "eleven billion, two hundred five million, eight hundred twenty-one thousand, two hundred forty-five".