212111413 has 4 divisors (see below), whose sum is σ = 214211628. Its totient is φ = 210011200.

The previous prime is 212111399. The next prime is 212111437. The reversal of 212111413 is 314111212.

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

It can be written as a sum of positive squares in 2 ways, for example, as 188705169 + 23406244 = 13737^2 + 4838^2 .

It is a cyclic number.

It is not a de Polignac number, because 212111413 - 2¹⁷ = 211980341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212111443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1049956 + ... + 1050157.

It is an arithmetic number, because the mean of its divisors is an integer number (53552907).

Almost surely, 2^212111413 is an apocalyptic number.

It is an amenable number.

212111413 is a deficient number, since it is larger than the sum of its proper divisors (2100215).

212111413 is a wasteful number, since it uses less digits than its factorization.

212111413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2100214.

The product of its digits is 48, while the sum is 16.

The square root of 212111413 is about 14564.0452141567. The cubic root of 212111413 is about 596.3776312326.

Adding to 212111413 its reverse (314111212), we get a palindrome (526222625).

The spelling of 212111413 in words is "two hundred twelve million, one hundred eleven thousand, four hundred thirteen".