11211938390011 has 2 divisors, whose sum is σ = 11211938390012. Its totient is φ = 11211938390010.

The previous prime is 11211938389973. The next prime is 11211938390053. The reversal of 11211938390011 is 11009383911211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11211938390011 - 2²¹ = 11211936292859 is a prime.

It is a super-2 number, since 2×11211938390011² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11211938391011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605969195005 + 5605969195006.

It is an arithmetic number, because the mean of its divisors is an integer number (5605969195006).

Almost surely, 2^{11211938390011} is an apocalyptic number.

11211938390011 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211938390011 is an equidigital number, since it uses as much as digits as its factorization.

11211938390011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 40.

The spelling of 11211938390011 in words is "eleven trillion, two hundred eleven billion, nine hundred thirty-eight million, three hundred ninety thousand, eleven".