100121211120191 has 2 divisors, whose sum is σ = 100121211120192. Its totient is φ = 100121211120190.

The previous prime is 100121211120149. The next prime is 100121211120199. The reversal of 100121211120191 is 191021112121001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100121211120191 - 2¹⁴ = 100121211103807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100121211120199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50060605560095 + 50060605560096.

It is an arithmetic number, because the mean of its divisors is an integer number (50060605560096).

Almost surely, 2^{100121211120191} is an apocalyptic number.

100121211120191 is a deficient number, since it is larger than the sum of its proper divisors (1).

100121211120191 is an equidigital number, since it uses as much as digits as its factorization.

100121211120191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 23.

Adding to 100121211120191 its reverse (191021112121001), we get a palindrome (291142323241192).

The spelling of 100121211120191 in words is "one hundred trillion, one hundred twenty-one billion, two hundred eleven million, one hundred twenty thousand, one hundred ninety-one".