11657217221050 has 72 divisors (see below), whose sum is σ = 22669071078780. Its totient is φ = 4459573113600.

The previous prime is 11657217221047. The next prime is 11657217221051. The reversal of 11657217221050 is 5012271275611.

It can be written as a sum of positive squares in 6 ways, for example, as 3583157483929 + 8074059737121 = 1892923^2 + 2841489^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11657217220994 and 11657217221012.

It is not an unprimeable number, because it can be changed into a prime (11657217221051) 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 35 ways as a sum of consecutive naturals, for example, 242284396 + ... + 242332504.

Almost surely, 2^{11657217221050} is an apocalyptic number.

11657217221050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11657217221050 is a deficient number, since it is larger than the sum of its proper divisors (11011853857730).

11657217221050 is a wasteful number, since it uses less digits than its factorization.

11657217221050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57328 (or 57300 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 40.

Adding to 11657217221050 its reverse (5012271275611), we get a palindrome (16669488496661).

The spelling of 11657217221050 in words is "eleven trillion, six hundred fifty-seven billion, two hundred seventeen million, two hundred twenty-one thousand, fifty".