212113311 has 16 divisors (see below), whose sum is σ = 285317760. Its totient is φ = 140165280.

The previous prime is 212113309. The next prime is 212113313. The reversal of 212113311 is 113311212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (212113309) and next prime (212113313).

It is not a de Polignac number, because 212113311 - 2¹ = 212113309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212113313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193876 + ... + 194966.

It is an arithmetic number, because the mean of its divisors is an integer number (17832360).

Almost surely, 2^212113311 is an apocalyptic number.

212113311 is a deficient number, since it is larger than the sum of its proper divisors (73204449).

212113311 is a wasteful number, since it uses less digits than its factorization.

212113311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1606.

The product of its digits is 36, while the sum is 15.

The square root of 212113311 is about 14564.1103744788. The cubic root of 212113311 is about 596.3794100484.

Adding to 212113311 its reverse (113311212), we get a palindrome (325424523).

The spelling of 212113311 in words is "two hundred twelve million, one hundred thirteen thousand, three hundred eleven".