213311112111 has 24 divisors (see below), whose sum is σ = 309084082320. Its totient is φ = 141761321856.

The previous prime is 213311112107. The next prime is 213311112121. The reversal of 213311112111 is 111211113312.

It is not a de Polignac number, because 213311112111 - 2² = 213311112107 is a prime.

It is a super-2 number, since 2×213311112111² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213311112121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3725280 + ... + 3782106.

It is an arithmetic number, because the mean of its divisors is an integer number (12878503430).

Almost surely, 2^213311112111 is an apocalyptic number.

213311112111 is a deficient number, since it is larger than the sum of its proper divisors (95772970209).

213311112111 is a wasteful number, since it uses less digits than its factorization.

213311112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58135 (or 58132 counting only the distinct ones).

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

Adding to 213311112111 its reverse (111211113312), we get a palindrome (324522225423).

The spelling of 213311112111 in words is "two hundred thirteen billion, three hundred eleven million, one hundred twelve thousand, one hundred eleven".