213912903361811 has 2 divisors, whose sum is σ = 213912903361812. Its totient is φ = 213912903361810.

The previous prime is 213912903361693. The next prime is 213912903361877. The reversal of 213912903361811 is 118163309219312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213912903361811 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213912903361811.

It is not a weakly prime, because it can be changed into another prime (213912903361511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106956451680905 + 106956451680906.

It is an arithmetic number, because the mean of its divisors is an integer number (106956451680906).

Almost surely, 2^{213912903361811} is an apocalyptic number.

213912903361811 is a deficient number, since it is larger than the sum of its proper divisors (1).

213912903361811 is an equidigital number, since it uses as much as digits as its factorization.

213912903361811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 419904, while the sum is 50.

The spelling of 213912903361811 in words is "two hundred thirteen trillion, nine hundred twelve billion, nine hundred three million, three hundred sixty-one thousand, eight hundred eleven".