1222222013 has 4 divisors (see below), whose sum is σ = 1252032348. Its totient is φ = 1192411680.

The previous prime is 1222222007. The next prime is 1222222031. The reversal of 1222222013 is 3102222221.

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 404090404 + 818131609 = 20102^2 + 28603^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222222013 - 2⁴ = 1222221997 is a prime.

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 = 1222221982 and 1222222000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222222003) 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, 14905106 + ... + 14905187.

It is an arithmetic number, because the mean of its divisors is an integer number (313008087).

Almost surely, 2^1222222013 is an apocalyptic number.

It is an amenable number.

1222222013 is a deficient number, since it is larger than the sum of its proper divisors (29810335).

1222222013 is an equidigital number, since it uses as much as digits as its factorization.

1222222013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29810334.

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

The square root of 1222222013 is about 34960.2919467215. The cubic root of 1222222013 is about 1069.1780489907.

Adding to 1222222013 its reverse (3102222221), we get a palindrome (4324444234).

The spelling of 1222222013 in words is "one billion, two hundred twenty-two million, two hundred twenty-two thousand, thirteen".