211420163993 has 2 divisors, whose sum is σ = 211420163994. Its totient is φ = 211420163992.

The previous prime is 211420163963. The next prime is 211420164031. The reversal of 211420163993 is 399361024112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192661300624 + 18758863369 = 438932^2 + 136963^2 .

It is a cyclic number.

It is not a de Polignac number, because 211420163993 - 2²² = 211415969689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211420163993.

It is not a weakly prime, because it can be changed into another prime (211420163963) 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, 105710081996 + 105710081997.

It is an arithmetic number, because the mean of its divisors is an integer number (105710081997).

Almost surely, 2^211420163993 is an apocalyptic number.

It is an amenable number.

211420163993 is a deficient number, since it is larger than the sum of its proper divisors (1).

211420163993 is an equidigital number, since it uses as much as digits as its factorization.

211420163993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 41.

The spelling of 211420163993 in words is "two hundred eleven billion, four hundred twenty million, one hundred sixty-three thousand, nine hundred ninety-three".