109291107181 has 2 divisors, whose sum is σ = 109291107182. Its totient is φ = 109291107180.

The previous prime is 109291107179. The next prime is 109291107287. The reversal of 109291107181 is 181701192901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109236199081 + 54908100 = 330509^2 + 7410^2 .

It is a cyclic number.

It is not a de Polignac number, because 109291107181 - 2¹ = 109291107179 is a prime.

It is a super-2 number, since 2×109291107181² (a number of 23 digits) contains 22 as substring.

Together with 109291107179, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109291107131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54645553590 + 54645553591.

It is an arithmetic number, because the mean of its divisors is an integer number (54645553591).

Almost surely, 2^109291107181 is an apocalyptic number.

It is an amenable number.

109291107181 is a deficient number, since it is larger than the sum of its proper divisors (1).

109291107181 is an equidigital number, since it uses as much as digits as its factorization.

109291107181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 40.

The spelling of 109291107181 in words is "one hundred nine billion, two hundred ninety-one million, one hundred seven thousand, one hundred eighty-one".