11198653980721 has 9 divisors (see below), whose sum is σ = 11256451149099. Its totient is φ = 11141152119384.

The previous prime is 11198653980593. The next prime is 11198653980733. The reversal of 11198653980721 is 12708935689111.

The square root of 11198653980721 is 3346439.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 10972424376225 + 226229604496 = 3312465^2 + 475636^2 .

It is not a de Polignac number, because 11198653980721 - 2⁷ = 11198653980593 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11198653980721.

It is not an unprimeable number, because it can be changed into a prime (11198653950721) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 659239990 + ... + 659256976.

Almost surely, 2^{11198653980721} is an apocalyptic number.

11198653980721 is the 3346439-th square number.

11198653980721 is the 1673220-th centered octagonal number.

It is an amenable number.

11198653980721 is a deficient number, since it is larger than the sum of its proper divisors (57797168378).

11198653980721 is an frugal number, since it uses more digits than its factorization.

11198653980721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34368 (or 17184 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 61.

The spelling of 11198653980721 in words is "eleven trillion, one hundred ninety-eight billion, six hundred fifty-three million, nine hundred eighty thousand, seven hundred twenty-one".