213011112 has 16 divisors (see below), whose sum is σ = 532527840. Its totient is φ = 71003696.

The previous prime is 213011093. The next prime is 213011159. The reversal of 213011112 is 211110312.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4437708 + ... + 4437755.

It is an arithmetic number, because the mean of its divisors is an integer number (33282990).

Almost surely, 2^213011112 is an apocalyptic number.

It is an amenable number.

213011112 is an abundant number, since it is smaller than the sum of its proper divisors (319516728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213011112 is a wasteful number, since it uses less digits than its factorization.

213011112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8875472 (or 8875468 counting only the distinct ones).

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

The square root of 213011112 is about 14594.9002052087. The cubic root of 213011112 is about 597.2196470748.

Adding to 213011112 its reverse (211110312), we get a palindrome (424121424).

The spelling of 213011112 in words is "two hundred thirteen million, eleven thousand, one hundred twelve".