11722942085 has 4 divisors (see below), whose sum is σ = 14067530508. Its totient is φ = 9378353664.

The previous prime is 11722942079. The next prime is 11722942087. The reversal of 11722942085 is 58024922711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58024922711 = 7 ⋅8289274673.

It can be written as a sum of positive squares in 2 ways, for example, as 2367990244 + 9354951841 = 48662^2 + 96721^2 .

It is a cyclic number.

It is not a de Polignac number, because 11722942085 - 2¹⁴ = 11722925701 is a prime.

It is a super-2 number, since 2×11722942085² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11722942087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1172294204 + ... + 1172294213.

It is an arithmetic number, because the mean of its divisors is an integer number (3516882627).

Almost surely, 2^11722942085 is an apocalyptic number.

It is an amenable number.

11722942085 is a deficient number, since it is larger than the sum of its proper divisors (2344588423).

11722942085 is an equidigital number, since it uses as much as digits as its factorization.

11722942085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2344588422.

The product of its (nonzero) digits is 80640, while the sum is 41.

The spelling of 11722942085 in words is "eleven billion, seven hundred twenty-two million, nine hundred forty-two thousand, eighty-five".