121210118015897 has 2 divisors, whose sum is σ = 121210118015898. Its totient is φ = 121210118015896.

The previous prime is 121210118015803. The next prime is 121210118015947. The reversal of 121210118015897 is 798510811012121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73178717455936 + 48031400559961 = 8554456^2 + 6930469^2 .

It is a cyclic number.

It is not a de Polignac number, because 121210118015897 - 2⁸ = 121210118015641 is a prime.

It is not a weakly prime, because it can be changed into another prime (121210118015797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60605059007948 + 60605059007949.

It is an arithmetic number, because the mean of its divisors is an integer number (60605059007949).

Almost surely, 2^{121210118015897} is an apocalyptic number.

It is an amenable number.

121210118015897 is a deficient number, since it is larger than the sum of its proper divisors (1).

121210118015897 is an equidigital number, since it uses as much as digits as its factorization.

121210118015897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 47.

The spelling of 121210118015897 in words is "one hundred twenty-one trillion, two hundred ten billion, one hundred eighteen million, fifteen thousand, eight hundred ninety-seven".