109142052497081 has 2 divisors, whose sum is σ = 109142052497082. Its totient is φ = 109142052497080.

The previous prime is 109142052497069. The next prime is 109142052497113. The reversal of 109142052497081 is 180794250241901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108911849255056 + 230203242025 = 10436084^2 + 479795^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109142052497081 is a prime.

It is a super-2 number, since 2×109142052497081² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (109142052497381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54571026248540 + 54571026248541.

It is an arithmetic number, because the mean of its divisors is an integer number (54571026248541).

Almost surely, 2^{109142052497081} is an apocalyptic number.

It is an amenable number.

109142052497081 is a deficient number, since it is larger than the sum of its proper divisors (1).

109142052497081 is an equidigital number, since it uses as much as digits as its factorization.

109142052497081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1451520, while the sum is 53.

The spelling of 109142052497081 in words is "one hundred nine trillion, one hundred forty-two billion, fifty-two million, four hundred ninety-seven thousand, eighty-one".