211261345813 has 48 divisors (see below), whose sum is σ = 270160000000. Its totient is φ = 164929201920.

The previous prime is 211261345787. The next prime is 211261345817. The reversal of 211261345813 is 318543162112.

It is not a de Polignac number, because 211261345813 - 2⁹ = 211261345301 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 (211261345817) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3038563 + ... + 3107311.

Almost surely, 2^211261345813 is an apocalyptic number.

It is an amenable number.

211261345813 is a deficient number, since it is larger than the sum of its proper divisors (58898654187).

211261345813 is an equidigital number, since it uses as much as digits as its factorization.

211261345813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68835 (or 68804 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The spelling of 211261345813 in words is "two hundred eleven billion, two hundred sixty-one million, three hundred forty-five thousand, eight hundred thirteen".