10121312321191 has 2 divisors, whose sum is σ = 10121312321192. Its totient is φ = 10121312321190.

The previous prime is 10121312321171. The next prime is 10121312321279. The reversal of 10121312321191 is 19112321312101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10121312321191 - 2¹³ = 10121312312999 is a prime.

It is a super-6 number, since 6×10121312321191⁶ (a number of 79 digits) contains 666666 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10121312321171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5060656160595 + 5060656160596.

It is an arithmetic number, because the mean of its divisors is an integer number (5060656160596).

Almost surely, 2^{10121312321191} is an apocalyptic number.

10121312321191 is a deficient number, since it is larger than the sum of its proper divisors (1).

10121312321191 is an equidigital number, since it uses as much as digits as its factorization.

10121312321191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 28.

Adding to 10121312321191 its reverse (19112321312101), we get a palindrome (29233633633292).

The spelling of 10121312321191 in words is "ten trillion, one hundred twenty-one billion, three hundred twelve million, three hundred twenty-one thousand, one hundred ninety-one".