12020213 has 4 divisors (see below), whose sum is σ = 12089868. Its totient is φ = 11950560.

The previous prime is 12020209. The next prime is 12020221. The reversal of 12020213 is 31202021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31202021 = 17 ⋅1835413.

It can be written as a sum of positive squares in 2 ways, for example, as 8421604 + 3598609 = 2902^2 + 1897^2 .

It is a cyclic number.

It is not a de Polignac number, because 12020213 - 2² = 12020209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12020194 and 12020203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34568 + ... + 34913.

It is an arithmetic number, because the mean of its divisors is an integer number (3022467).

Almost surely, 2^12020213 is an apocalyptic number.

It is an amenable number.

12020213 is a deficient number, since it is larger than the sum of its proper divisors (69655).

12020213 is an equidigital number, since it uses as much as digits as its factorization.

12020213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69654.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 12020213 is about 3467.0178828498. The cubic root of 12020213 is about 229.0713214536.

Adding to 12020213 its reverse (31202021), we get a palindrome (43222234).

It can be divided in two parts, 1202021 and 3, that multiplied together give a palindrome (3606063).

The spelling of 12020213 in words is "twelve million, twenty thousand, two hundred thirteen".