109671365121691 has 2 divisors, whose sum is σ = 109671365121692. Its totient is φ = 109671365121690.

The previous prime is 109671365121631. The next prime is 109671365121767. The reversal of 109671365121691 is 196121563176901.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109671365121691 is a prime.

It is a super-2 number, since 2×109671365121691² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (109671365121601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54835682560845 + 54835682560846.

It is an arithmetic number, because the mean of its divisors is an integer number (54835682560846).

Almost surely, 2^{109671365121691} is an apocalyptic number.

109671365121691 is a deficient number, since it is larger than the sum of its proper divisors (1).

109671365121691 is an equidigital number, since it uses as much as digits as its factorization.

109671365121691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3674160, while the sum is 58.

The spelling of 109671365121691 in words is "one hundred nine trillion, six hundred seventy-one billion, three hundred sixty-five million, one hundred twenty-one thousand, six hundred ninety-one".