2111706321 has 8 divisors (see below), whose sum is σ = 2818059264. Its totient is φ = 1406578800.

The previous prime is 2111706319. The next prime is 2111706349. The reversal of 2111706321 is 1236071112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2111706321 - 2¹ = 2111706319 is a prime.

It is a super-4 number, since 4×2111706321⁴ (a number of 38 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2111706291 and 2111706300.

It is not an unprimeable number, because it can be changed into a prime (2111706361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302326 + ... + 309231.

It is an arithmetic number, because the mean of its divisors is an integer number (352257408).

Almost surely, 2^2111706321 is an apocalyptic number.

It is an amenable number.

2111706321 is a deficient number, since it is larger than the sum of its proper divisors (706352943).

2111706321 is a wasteful number, since it uses less digits than its factorization.

2111706321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612711.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 2111706321 is about 45953.3058767266. The cubic root of 2111706321 is about 1282.9542604617.

Adding to 2111706321 its reverse (1236071112), we get a palindrome (3347777433).

The spelling of 2111706321 in words is "two billion, one hundred eleven million, seven hundred six thousand, three hundred twenty-one".