1222400213 has 8 divisors (see below), whose sum is σ = 1236432600. Its totient is φ = 1208424448.

The previous prime is 1222400209. The next prime is 1222400239. The reversal of 1222400213 is 3120042221.

It can be written as a sum of positive squares in 4 ways, for example, as 1456849 + 1220943364 = 1207^2 + 34942^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1222400213 - 2² = 1222400209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222400191 and 1222400200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222400203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30053 + ... + 57861.

It is an arithmetic number, because the mean of its divisors is an integer number (154554075).

Almost surely, 2^1222400213 is an apocalyptic number.

It is an amenable number.

1222400213 is a deficient number, since it is larger than the sum of its proper divisors (14032387).

1222400213 is a wasteful number, since it uses less digits than its factorization.

1222400213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28311.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1222400213 is about 34962.8404595508. The cubic root of 1222400213 is about 1069.2300085276.

Adding to 1222400213 its reverse (3120042221), we get a palindrome (4342442434).

The spelling of 1222400213 in words is "one billion, two hundred twenty-two million, four hundred thousand, two hundred thirteen".