919311211220011 has 2 divisors, whose sum is σ = 919311211220012. Its totient is φ = 919311211220010.

The previous prime is 919311211219991. The next prime is 919311211220057. The reversal of 919311211220011 is 110022112113919.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (110022112113919) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 919311211220011 - 2³¹ = 919309063736363 is a prime.

It is not a weakly prime, because it can be changed into another prime (919311211220111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459655605610005 + 459655605610006.

It is an arithmetic number, because the mean of its divisors is an integer number (459655605610006).

Almost surely, 2^{919311211220011} is an apocalyptic number.

919311211220011 is a deficient number, since it is larger than the sum of its proper divisors (1).

919311211220011 is an equidigital number, since it uses as much as digits as its factorization.

919311211220011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 34.

The spelling of 919311211220011 in words is "nine hundred nineteen trillion, three hundred eleven billion, two hundred eleven million, two hundred twenty thousand, eleven".