191101121001101 has 2 divisors, whose sum is σ = 191101121001102. Its totient is φ = 191101121001100.

The previous prime is 191101121001031. The next prime is 191101121001103. The reversal of 191101121001101 is 101100121101191.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100201581485476 + 90899539515625 = 10010074^2 + 9534125^2 .

It is a cyclic number.

It is not a de Polignac number, because 191101121001101 - 2¹⁴ = 191101120984717 is a prime.

Together with 191101121001103, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191101121001103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95550560500550 + 95550560500551.

It is an arithmetic number, because the mean of its divisors is an integer number (95550560500551).

Almost surely, 2^{191101121001101} is an apocalyptic number.

It is an amenable number.

191101121001101 is a deficient number, since it is larger than the sum of its proper divisors (1).

191101121001101 is an equidigital number, since it uses as much as digits as its factorization.

191101121001101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 20.

Adding to 191101121001101 its reverse (101100121101191), we get a palindrome (292201242102292).

The spelling of 191101121001101 in words is "one hundred ninety-one trillion, one hundred one billion, one hundred twenty-one million, one thousand, one hundred one".