121201121101997 has 2 divisors, whose sum is σ = 121201121101998. Its totient is φ = 121201121101996.

The previous prime is 121201121101981. The next prime is 121201121102021. The reversal of 121201121101997 is 799101121102121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73019947419241 + 48181173682756 = 8545171^2 + 6941266^2 .

It is a cyclic number.

It is not a de Polignac number, because 121201121101997 - 2⁴ = 121201121101981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121201121101997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121201121101897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60600560550998 + 60600560550999.

It is an arithmetic number, because the mean of its divisors is an integer number (60600560550999).

Almost surely, 2^{121201121101997} is an apocalyptic number.

It is an amenable number.

121201121101997 is a deficient number, since it is larger than the sum of its proper divisors (1).

121201121101997 is an equidigital number, since it uses as much as digits as its factorization.

121201121101997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 38.

The spelling of 121201121101997 in words is "one hundred twenty-one trillion, two hundred one billion, one hundred twenty-one million, one hundred one thousand, nine hundred ninety-seven".