1220213 has 4 divisors (see below), whose sum is σ = 1226208. Its totient is φ = 1214220.

The previous prime is 1220203. The next prime is 1220239. The reversal of 1220213 is 3120221.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3120221 = 13 ⋅240017.

It is a cyclic number.

It is not a de Polignac number, because 1220213 - 2⁸ = 1219957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220194 and 1220203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220203) 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, 2681 + ... + 3102.

It is an arithmetic number, because the mean of its divisors is an integer number (306552).

2^1220213 is an apocalyptic number.

It is an amenable number.

1220213 is a deficient number, since it is larger than the sum of its proper divisors (5995).

1220213 is an equidigital number, since it uses as much as digits as its factorization.

1220213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5994.

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

The square root of 1220213 is about 1104.6325180801. The cubic root of 1220213 is about 106.8591911457.

Adding to 1220213 its reverse (3120221), we get a palindrome (4340434).

It can be divided in two parts, 12 and 20213, that multiplied together give a triangular number (242556 = T₆₉₆).

The spelling of 1220213 in words is "one million, two hundred twenty thousand, two hundred thirteen".