210685348491311 has 4 divisors (see below), whose sum is σ = 210729232134624. Its totient is φ = 210641464848000.

The previous prime is 210685348491307. The next prime is 210685348491367. The reversal of 210685348491311 is 113194843586012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 210685348491311 - 2² = 210685348491307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210685348491011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21941814455 + ... + 21941824056.

It is an arithmetic number, because the mean of its divisors is an integer number (52682308033656).

Almost surely, 2^{210685348491311} is an apocalyptic number.

210685348491311 is a deficient number, since it is larger than the sum of its proper divisors (43883643313).

210685348491311 is an equidigital number, since it uses as much as digits as its factorization.

210685348491311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43883643312.

The product of its (nonzero) digits is 4976640, while the sum is 56.

The spelling of 210685348491311 in words is "two hundred ten trillion, six hundred eighty-five billion, three hundred forty-eight million, four hundred ninety-one thousand, three hundred eleven".