212113331 has 4 divisors (see below), whose sum is σ = 213224064. Its totient is φ = 211002600.

The previous prime is 212113327. The next prime is 212113333. The reversal of 212113331 is 133311212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212113331 - 2² = 212113327 is a prime.

It is a super-2 number, since 2×212113331² = 89984130375831122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212113333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555080 + ... + 555461.

It is an arithmetic number, because the mean of its divisors is an integer number (53306016).

Almost surely, 2^212113331 is an apocalyptic number.

212113331 is a deficient number, since it is larger than the sum of its proper divisors (1110733).

212113331 is a wasteful number, since it uses less digits than its factorization.

212113331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110732.

The product of its digits is 108, while the sum is 17.

The square root of 212113331 is about 14564.1110610981. Note that the first 3 decimals coincide. The cubic root of 212113331 is about 596.3794287924.

Adding to 212113331 its reverse (133311212), we get a palindrome (345424543).

It can be divided in two parts, 21211 and 3331, that added together give a palindrome (24542).

The spelling of 212113331 in words is "two hundred twelve million, one hundred thirteen thousand, three hundred thirty-one".