121121210971 has 2 divisors, whose sum is σ = 121121210972. Its totient is φ = 121121210970.

The previous prime is 121121210933. The next prime is 121121211037. The reversal of 121121210971 is 179012121121.

It is a weak prime.

It is an emirp because it is prime and its reverse (179012121121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121121210971 - 2⁹ = 121121210459 is a prime.

It is not a weakly prime, because it can be changed into another prime (121121214971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60560605485 + 60560605486.

It is an arithmetic number, because the mean of its divisors is an integer number (60560605486).

Almost surely, 2^121121210971 is an apocalyptic number.

121121210971 is a deficient number, since it is larger than the sum of its proper divisors (1).

121121210971 is an equidigital number, since it uses as much as digits as its factorization.

121121210971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 28.

The spelling of 121121210971 in words is "one hundred twenty-one billion, one hundred twenty-one million, two hundred ten thousand, nine hundred seventy-one".