2127775152121 has 4 divisors (see below), whose sum is σ = 2128494727332. Its totient is φ = 2127055576912.

The previous prime is 2127775152067. The next prime is 2127775152143. The reversal of 2127775152121 is 1212515777212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 232141839721 + 1895633312400 = 481811^2 + 1376820^2 .

It is a cyclic number.

It is not a de Polignac number, because 2127775152121 - 2¹⁷ = 2127775021049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2127775158121) 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, 359783170 + ... + 359789083.

It is an arithmetic number, because the mean of its divisors is an integer number (532123681833).

Almost surely, 2^{2127775152121} is an apocalyptic number.

It is an amenable number.

2127775152121 is a deficient number, since it is larger than the sum of its proper divisors (719575211).

2127775152121 is an equidigital number, since it uses as much as digits as its factorization.

2127775152121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719575210.

The product of its digits is 137200, while the sum is 43.

The spelling of 2127775152121 in words is "two trillion, one hundred twenty-seven billion, seven hundred seventy-five million, one hundred fifty-two thousand, one hundred twenty-one".