27921101361 has 4 divisors (see below), whose sum is σ = 37228135152. Its totient is φ = 18614067572.

The previous prime is 27921101347. The next prime is 27921101381. The reversal of 27921101361 is 16310112972.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27921101361 - 2⁷ = 27921101233 is a prime.

It is a super-2 number, since 2×27921101361² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27921101381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4653516891 + ... + 4653516896.

It is an arithmetic number, because the mean of its divisors is an integer number (9307033788).

Almost surely, 2^27921101361 is an apocalyptic number.

It is an amenable number.

27921101361 is a deficient number, since it is larger than the sum of its proper divisors (9307033791).

27921101361 is an equidigital number, since it uses as much as digits as its factorization.

27921101361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9307033790.

The product of its (nonzero) digits is 4536, while the sum is 33.

The spelling of 27921101361 in words is "twenty-seven billion, nine hundred twenty-one million, one hundred one thousand, three hundred sixty-one".