211671384881 has 16 divisors (see below), whose sum is σ = 234231782400. Its totient is φ = 189665422800.

The previous prime is 211671384871. The next prime is 211671384887. The reversal of 211671384881 is 188483176112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 211671384881 - 2²² = 211667190577 is a prime.

It is a super-2 number, since 2×211671384881² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211671384887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2915540 + ... + 2987258.

It is an arithmetic number, because the mean of its divisors is an integer number (14639486400).

Almost surely, 2^211671384881 is an apocalyptic number.

It is an amenable number.

211671384881 is a deficient number, since it is larger than the sum of its proper divisors (22560397519).

211671384881 is a wasteful number, since it uses less digits than its factorization.

211671384881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75580.

The product of its digits is 516096, while the sum is 50.

The spelling of 211671384881 in words is "two hundred eleven billion, six hundred seventy-one million, three hundred eighty-four thousand, eight hundred eighty-one".