11161200706721 has 8 divisors (see below), whose sum is σ = 12312919354344. Its totient is φ = 10051362737280.

The previous prime is 11161200706619. The next prime is 11161200706739. The reversal of 11161200706721 is 12760700216111.

It can be written as a sum of positive squares in 4 ways, for example, as 1485144382225 + 9676056324496 = 1218665^2 + 3110636^2 .

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 11161200706721 - 2¹⁸ = 11161200444577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11161200706741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10470168986 + ... + 10470170051.

It is an arithmetic number, because the mean of its divisors is an integer number (1539114919293).

Almost surely, 2^{11161200706721} is an apocalyptic number.

It is an amenable number.

11161200706721 is a deficient number, since it is larger than the sum of its proper divisors (1151718647623).

11161200706721 is a wasteful number, since it uses less digits than its factorization.

11161200706721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20940339091.

The product of its (nonzero) digits is 7056, while the sum is 35.

The spelling of 11161200706721 in words is "eleven trillion, one hundred sixty-one billion, two hundred million, seven hundred six thousand, seven hundred twenty-one".