10209942991117 has 2 divisors, whose sum is σ = 10209942991118. Its totient is φ = 10209942991116.

The previous prime is 10209942991109. The next prime is 10209942991147. The reversal of 10209942991117 is 71119924990201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9577824177636 + 632118813481 = 3094806^2 + 795059^2 .

It is a cyclic number.

It is not a de Polignac number, because 10209942991117 - 2³ = 10209942991109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10209942991147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5104971495558 + 5104971495559.

It is an arithmetic number, because the mean of its divisors is an integer number (5104971495559).

Almost surely, 2^{10209942991117} is an apocalyptic number.

It is an amenable number.

10209942991117 is a deficient number, since it is larger than the sum of its proper divisors (1).

10209942991117 is an equidigital number, since it uses as much as digits as its factorization.

10209942991117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 734832, while the sum is 55.

The spelling of 10209942991117 in words is "ten trillion, two hundred nine billion, nine hundred forty-two million, nine hundred ninety-one thousand, one hundred seventeen".