212111513 has 4 divisors (see below), whose sum is σ = 213177600. Its totient is φ = 211045428.

The previous prime is 212111489. The next prime is 212111521. The reversal of 212111513 is 315111212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212111513 - 2⁸ = 212111257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212111491 and 212111500.

It is not an unprimeable number, because it can be changed into a prime (212111593) 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, 532745 + ... + 533142.

It is an arithmetic number, because the mean of its divisors is an integer number (53294400).

Almost surely, 2^212111513 is an apocalyptic number.

It is an amenable number.

212111513 is a deficient number, since it is larger than the sum of its proper divisors (1066087).

212111513 is a wasteful number, since it uses less digits than its factorization.

212111513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066086.

The product of its digits is 60, while the sum is 17.

The square root of 212111513 is about 14564.0486472684. The cubic root of 212111513 is about 596.3777249534.

Adding to 212111513 its reverse (315111212), we get a palindrome (527222725).

The spelling of 212111513 in words is "two hundred twelve million, one hundred eleven thousand, five hundred thirteen".