853211111 has 2 divisors, whose sum is σ = 853211112. Its totient is φ = 853211110.

The previous prime is 853211081. The next prime is 853211141. The reversal of 853211111 is 111112358.

It is a balanced prime because it is at equal distance from previous prime (853211081) and next prime (853211141).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-853211111 is a prime.

It is a super-3 number, since 3×853211111³ (a number of 28 digits) contains 333 as substring.

853211111 is a modest number, since divided by 11111 gives 8532 as remainder.

It is a nialpdrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (853211141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426605555 + 426605556.

It is an arithmetic number, because the mean of its divisors is an integer number (426605556).

Almost surely, 2^853211111 is an apocalyptic number.

853211111 is a deficient number, since it is larger than the sum of its proper divisors (1).

853211111 is an equidigital number, since it uses as much as digits as its factorization.

853211111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 240, while the sum is 23.

The square root of 853211111 is about 29209.7776609135. Note that the first 3 decimals coincide. The cubic root of 853211111 is about 948.4595944727.

Adding to 853211111 its reverse (111112358), we get a palindrome (964323469).

The spelling of 853211111 in words is "eight hundred fifty-three million, two hundred eleven thousand, one hundred eleven".