2121012121027 has 2 divisors, whose sum is σ = 2121012121028. Its totient is φ = 2121012121026.

The previous prime is 2121012120989. The next prime is 2121012121139. The reversal of 2121012121027 is 7201212101212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121012121027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2121012120989 and 2121012121007.

It is not a weakly prime, because it can be changed into another prime (2121012181027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060506060513 + 1060506060514.

It is an arithmetic number, because the mean of its divisors is an integer number (1060506060514).

Almost surely, 2^{2121012121027} is an apocalyptic number.

2121012121027 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121012121027 is an equidigital number, since it uses as much as digits as its factorization.

2121012121027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 22.

Adding to 2121012121027 its reverse (7201212101212), we get a palindrome (9322224222239).

The spelling of 2121012121027 in words is "two trillion, one hundred twenty-one billion, twelve million, one hundred twenty-one thousand, twenty-seven".