2121012308897 has 2 divisors, whose sum is σ = 2121012308898. Its totient is φ = 2121012308896.

The previous prime is 2121012308887. The next prime is 2121012308917. The reversal of 2121012308897 is 7988032101212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2048436487696 + 72575821201 = 1431236^2 + 269399^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121012308897 - 2⁸ = 2121012308641 is a prime.

It is not a weakly prime, because it can be changed into another prime (2121012308887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060506154448 + 1060506154449.

It is an arithmetic number, because the mean of its divisors is an integer number (1060506154449).

Almost surely, 2^{2121012308897} is an apocalyptic number.

It is an amenable number.

2121012308897 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121012308897 is an equidigital number, since it uses as much as digits as its factorization.

2121012308897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 44.

The spelling of 2121012308897 in words is "two trillion, one hundred twenty-one billion, twelve million, three hundred eight thousand, eight hundred ninety-seven".