10121201211997 has 2 divisors, whose sum is σ = 10121201211998. Its totient is φ = 10121201211996.

The previous prime is 10121201211943. The next prime is 10121201212069. The reversal of 10121201211997 is 79911210212101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7629163264836 + 2492037947161 = 2762094^2 + 1578619^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10121201211997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10121201211697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5060600605998 + 5060600605999.

It is an arithmetic number, because the mean of its divisors is an integer number (5060600605999).

Almost surely, 2^{10121201211997} is an apocalyptic number.

It is an amenable number.

10121201211997 is a deficient number, since it is larger than the sum of its proper divisors (1).

10121201211997 is an equidigital number, since it uses as much as digits as its factorization.

10121201211997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 37.

The spelling of 10121201211997 in words is "ten trillion, one hundred twenty-one billion, two hundred one million, two hundred eleven thousand, nine hundred ninety-seven".