320012111 has 2 divisors, whose sum is σ = 320012112. Its totient is φ = 320012110.

The previous prime is 320012107. The next prime is 320012141. The reversal of 320012111 is 111210023.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 320012111 - 2² = 320012107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 320012092 and 320012101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320012141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160006055 + 160006056.

It is an arithmetic number, because the mean of its divisors is an integer number (160006056).

Almost surely, 2^320012111 is an apocalyptic number.

320012111 is a deficient number, since it is larger than the sum of its proper divisors (1).

320012111 is an equidigital number, since it uses as much as digits as its factorization.

320012111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 320012111 is about 17888.8823295364. The cubic root of 320012111 is about 683.9990075279. Note that the first 3 decimals are identical.

Adding to 320012111 its reverse (111210023), we get a palindrome (431222134).

The spelling of 320012111 in words is "three hundred twenty million, twelve thousand, one hundred eleven".