212133013 has 4 divisors (see below), whose sum is σ = 214516620. Its totient is φ = 209749408.

The previous prime is 212133011. The next prime is 212133017. The reversal of 212133013 is 310331212.

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 140612164 + 71520849 = 11858^2 + 8457^2 .

It is a cyclic number.

It is not a de Polignac number, because 212133013 - 2¹ = 212133011 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 (212133011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1191670 + ... + 1191847.

It is an arithmetic number, because the mean of its divisors is an integer number (53629155).

Almost surely, 2^212133013 is an apocalyptic number.

It is an amenable number.

212133013 is a deficient number, since it is larger than the sum of its proper divisors (2383607).

212133013 is an equidigital number, since it uses as much as digits as its factorization.

212133013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2383606.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 212133013 is about 14564.7867474948. The cubic root of 212133013 is about 596.3978742414.

Adding to 212133013 its reverse (310331212), we get a palindrome (522464225).

It can be divided in two parts, 212 and 133013, that added together give a square (133225 = 365²).

The spelling of 212133013 in words is "two hundred twelve million, one hundred thirty-three thousand, thirteen".