121121010210191 has 2 divisors, whose sum is σ = 121121010210192. Its totient is φ = 121121010210190.

The previous prime is 121121010210157. The next prime is 121121010210199. The reversal of 121121010210191 is 191012010121121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121121010210191 is a prime.

It is a super-2 number, since 2×121121010210191² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121121010210199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60560505105095 + 60560505105096.

It is an arithmetic number, because the mean of its divisors is an integer number (60560505105096).

Almost surely, 2^{121121010210191} is an apocalyptic number.

121121010210191 is a deficient number, since it is larger than the sum of its proper divisors (1).

121121010210191 is an equidigital number, since it uses as much as digits as its factorization.

121121010210191 is an evil number, because the sum of its binary digits is even.

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

The spelling of 121121010210191 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, ten million, two hundred ten thousand, one hundred ninety-one".