1213220310223 has 4 divisors (see below), whose sum is σ = 1217697138208. Its totient is φ = 1208743482240.

The previous prime is 1213220310157. The next prime is 1213220310287. The reversal of 1213220310223 is 3220130223121.

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 1213220310223 - 2¹⁷ = 1213220179151 is a prime.

It is a super-2 number, since 2×1213220310223² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213220310194 and 1213220310203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213220310293) 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, 2238413586 + ... + 2238414127.

It is an arithmetic number, because the mean of its divisors is an integer number (304424284552).

Almost surely, 2^{1213220310223} is an apocalyptic number.

1213220310223 is a deficient number, since it is larger than the sum of its proper divisors (4476827985).

1213220310223 is an equidigital number, since it uses as much as digits as its factorization.

1213220310223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4476827984.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 1213220310223 its reverse (3220130223121), we get a palindrome (4433350533344).

The spelling of 1213220310223 in words is "one trillion, two hundred thirteen billion, two hundred twenty million, three hundred ten thousand, two hundred twenty-three".