212013 has 6 divisors (see below), whose sum is σ = 306254. Its totient is φ = 141336.
The previous prime is 211997. The next prime is 212029. The reversal of 212013 is 310212.
It is a happy number.
It is an interprime number because it is at equal distance from previous prime (211997) and next prime (212029).
It can be written as a sum of positive squares in only one way, i.e., 110889 + 101124 = 333^2 + 318^2 .
It is not a de Polignac number, because 212013 - 24 = 211997 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 23557 = 212013 / (2 + 1 + 2 + 0 + 1 + 3).
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 = 211986 and 212004.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (232013) by changing a digit.
It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11770 + ... + 11787.
2212013 is an apocalyptic number.
It is an amenable number.
212013 is a deficient number, since it is larger than the sum of its proper divisors (94241).
212013 is a wasteful number, since it uses less digits than its factorization.
212013 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 23563 (or 23560 counting only the distinct ones).
The product of its (nonzero) digits is 12, while the sum is 9.
The square root of 212013 is about 460.4486942103. The cubic root of 212013 is about 59.6285383499.
Adding to 212013 its reverse (310212), we get a palindrome (522225).
The spelling of 212013 in words is "two hundred twelve thousand, thirteen".
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