11001111973 has 2 divisors, whose sum is σ = 11001111974. Its totient is φ = 11001111972.

The previous prime is 11001111971. The next prime is 11001112007. The reversal of 11001111973 is 37911110011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6418092769 + 4583019204 = 80113^2 + 67698^2 .

It is a cyclic number.

It is not a de Polignac number, because 11001111973 - 2¹ = 11001111971 is a prime.

Together with 11001111971, 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 (11001111971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5500555986 + 5500555987.

It is an arithmetic number, because the mean of its divisors is an integer number (5500555987).

Almost surely, 2^11001111973 is an apocalyptic number.

It is an amenable number.

11001111973 is a deficient number, since it is larger than the sum of its proper divisors (1).

11001111973 is an equidigital number, since it uses as much as digits as its factorization.

11001111973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 189, while the sum is 25.

Adding to 11001111973 its reverse (37911110011), we get a palindrome (48912221984).

The spelling of 11001111973 in words is "eleven billion, one million, one hundred eleven thousand, nine hundred seventy-three".