11620205611721 has 8 divisors (see below), whose sum is σ = 13281728391744. Its totient is φ = 9959056183440.

The previous prime is 11620205611711. The next prime is 11620205611739. The reversal of 11620205611721 is 12711650202611.

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

It is not a de Polignac number, because 11620205611721 - 2¹⁰ = 11620205610697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11620205611711) 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 7 ways as a sum of consecutive naturals, for example, 93271235 + ... + 93395736.

It is an arithmetic number, because the mean of its divisors is an integer number (1660216048968).

Almost surely, 2^{11620205611721} is an apocalyptic number.

It is an amenable number.

11620205611721 is a deficient number, since it is larger than the sum of its proper divisors (1661522780023).

11620205611721 is an equidigital number, since it uses as much as digits as its factorization.

11620205611721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186675871.

The product of its (nonzero) digits is 10080, while the sum is 35.

The spelling of 11620205611721 in words is "eleven trillion, six hundred twenty billion, two hundred five million, six hundred eleven thousand, seven hundred twenty-one".