121210121121997 has 2 divisors, whose sum is σ = 121210121121998. Its totient is φ = 121210121121996.

The previous prime is 121210121121989. The next prime is 121210121122021. The reversal of 121210121121997 is 799121121012121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76026907474281 + 45183213647716 = 8719341^2 + 6721846^2 .

It is a cyclic number.

It is not a de Polignac number, because 121210121121997 - 2³ = 121210121121989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121210121121697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60605060560998 + 60605060560999.

It is an arithmetic number, because the mean of its divisors is an integer number (60605060560999).

Almost surely, 2^{121210121121997} is an apocalyptic number.

It is an amenable number.

121210121121997 is a deficient number, since it is larger than the sum of its proper divisors (1).

121210121121997 is an equidigital number, since it uses as much as digits as its factorization.

121210121121997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 40.

The spelling of 121210121121997 in words is "one hundred twenty-one trillion, two hundred ten billion, one hundred twenty-one million, one hundred twenty-one thousand, nine hundred ninety-seven".