213112113111 has 12 divisors (see below), whose sum is σ = 308026843488. Its totient is φ = 141983248704.

The previous prime is 213112113103. The next prime is 213112113121. The reversal of 213112113111 is 111311211312.

213112113111 is a `hidden beast` number, since 21 + 311 + 21 + 1 + 311 + 1 = 666.

It is not a de Polignac number, because 213112113111 - 2³ = 213112113103 is a prime.

It is a super-3 number, since 3×213112113111³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213112113121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7609695 + ... + 7637648.

It is an arithmetic number, because the mean of its divisors is an integer number (25668903624).

Almost surely, 2^213112113111 is an apocalyptic number.

213112113111 is a deficient number, since it is larger than the sum of its proper divisors (94914730377).

213112113111 is a wasteful number, since it uses less digits than its factorization.

213112113111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15248902 (or 15248899 counting only the distinct ones).

The product of its digits is 36, while the sum is 18.

Adding to 213112113111 its reverse (111311211312), we get a palindrome (324423324423).

It can be divided in two parts, 21311211311 and 1, that added together give a palindrome (21311211312).

The spelling of 213112113111 in words is "two hundred thirteen billion, one hundred twelve million, one hundred thirteen thousand, one hundred eleven".