11211178973 has 2 divisors, whose sum is σ = 11211178974. Its totient is φ = 11211178972.

The previous prime is 11211178907. The next prime is 11211179027. The reversal of 11211178973 is 37987111211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9298166329 + 1913012644 = 96427^2 + 43738^2 .

It is a cyclic number.

It is not a de Polignac number, because 11211178973 - 2¹⁰ = 11211177949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11211178973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11211148973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605589486 + 5605589487.

It is an arithmetic number, because the mean of its divisors is an integer number (5605589487).

Almost surely, 2^11211178973 is an apocalyptic number.

It is an amenable number.

11211178973 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211178973 is an equidigital number, since it uses as much as digits as its factorization.

11211178973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 41.

The spelling of 11211178973 in words is "eleven billion, two hundred eleven million, one hundred seventy-eight thousand, nine hundred seventy-three".