213111112111 has 8 divisors (see below), whose sum is σ = 215231344848. Its totient is φ = 210991080000.

The previous prime is 213111112103. The next prime is 213111112127. The reversal of 213111112111 is 111211111312.

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

It is a cyclic number.

It is not a de Polignac number, because 213111112111 - 2³ = 213111112103 is a prime.

It is a super-2 number, since 2×213111112111² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213111110111) 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, 3004131 + ... + 3074251.

It is an arithmetic number, because the mean of its divisors is an integer number (26903918106).

Almost surely, 2^213111112111 is an apocalyptic number.

213111112111 is a deficient number, since it is larger than the sum of its proper divisors (2120232737).

213111112111 is a wasteful number, since it uses less digits than its factorization.

213111112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100313.

The product of its digits is 12, while the sum is 16.

Adding to 213111112111 its reverse (111211111312), we get a palindrome (324322223423).

The spelling of 213111112111 in words is "two hundred thirteen billion, one hundred eleven million, one hundred twelve thousand, one hundred eleven".