1213051223 has 4 divisors (see below), whose sum is σ = 1222311288. Its totient is φ = 1203791160.

The previous prime is 1213051207. The next prime is 1213051283. The reversal of 1213051223 is 3221503121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1213051223 - 2⁴ = 1213051207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213051195 and 1213051204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213051283) 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, 4629836 + ... + 4630097.

It is an arithmetic number, because the mean of its divisors is an integer number (305577822).

Almost surely, 2^1213051223 is an apocalyptic number.

1213051223 is a deficient number, since it is larger than the sum of its proper divisors (9260065).

1213051223 is an equidigital number, since it uses as much as digits as its factorization.

1213051223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9260064.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1213051223 is about 34828.8848945814. The cubic root of 1213051223 is about 1066.4971846719.

Adding to 1213051223 its reverse (3221503121), we get a palindrome (4434554344).

The spelling of 1213051223 in words is "one billion, two hundred thirteen million, fifty-one thousand, two hundred twenty-three".