11331109997 has 2 divisors, whose sum is σ = 11331109998. Its totient is φ = 11331109996.

The previous prime is 11331109991. The next prime is 11331110051. The reversal of 11331109997 is 79990113311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7678841641 + 3652268356 = 87629^2 + 60434^2 .

It is a cyclic number.

It is not a de Polignac number, because 11331109997 - 2⁴ = 11331109981 is a prime.

It is a super-2 number, since 2×11331109997² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11331109991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5665554998 + 5665554999.

It is an arithmetic number, because the mean of its divisors is an integer number (5665554999).

Almost surely, 2^11331109997 is an apocalyptic number.

It is an amenable number.

11331109997 is a deficient number, since it is larger than the sum of its proper divisors (1).

11331109997 is an equidigital number, since it uses as much as digits as its factorization.

11331109997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45927, while the sum is 44.

The spelling of 11331109997 in words is "eleven billion, three hundred thirty-one million, one hundred nine thousand, nine hundred ninety-seven".