213112011 has 32 divisors (see below), whose sum is σ = 338300928. Its totient is φ = 116766720.

The previous prime is 213111991. The next prime is 213112019. The reversal of 213112011 is 110211312.

It is not a de Polignac number, because 213112011 - 2⁶ = 213111947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213112019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72115 + ... + 75011.

It is an arithmetic number, because the mean of its divisors is an integer number (10571904).

Almost surely, 2^213112011 is an apocalyptic number.

213112011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

213112011 is a deficient number, since it is larger than the sum of its proper divisors (125188917).

213112011 is a wasteful number, since it uses less digits than its factorization.

213112011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3051.

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

The square root of 213112011 is about 14598.3564485869. The cubic root of 213112011 is about 597.3139290940.

Adding to 213112011 its reverse (110211312), we get a palindrome (323323323).

The spelling of 213112011 in words is "two hundred thirteen million, one hundred twelve thousand, eleven".