121041199916291 has 2 divisors, whose sum is σ = 121041199916292. Its totient is φ = 121041199916290.

The previous prime is 121041199916251. The next prime is 121041199916347. The reversal of 121041199916291 is 192619991140121.

It is an a-pointer prime, because the next prime (121041199916347) can be obtained adding 121041199916291 to its sum of digits (56).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121041199916291 is a prime.

It is not a weakly prime, because it can be changed into another prime (121041199916251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60520599958145 + 60520599958146.

It is an arithmetic number, because the mean of its divisors is an integer number (60520599958146).

Almost surely, 2^{121041199916291} is an apocalyptic number.

121041199916291 is a deficient number, since it is larger than the sum of its proper divisors (1).

121041199916291 is an equidigital number, since it uses as much as digits as its factorization.

121041199916291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 629856, while the sum is 56.

The spelling of 121041199916291 in words is "one hundred twenty-one trillion, forty-one billion, one hundred ninety-nine million, nine hundred sixteen thousand, two hundred ninety-one".