1213020223 has 4 divisors (see below), whose sum is σ = 1213824528. Its totient is φ = 1212215920.

The previous prime is 1213020217. The next prime is 1213020241. The reversal of 1213020223 is 3220203121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3220203121 = 17 ⋅189423713.

It is a cyclic number.

It is not a de Polignac number, because 1213020223 - 2⁵ = 1213020191 is a prime.

It is a super-2 number, since 2×1213020223² = 2942836122813939458, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213020197 and 1213020206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213020283) 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, 399886 + ... + 402907.

It is an arithmetic number, because the mean of its divisors is an integer number (303456132).

Almost surely, 2^1213020223 is an apocalyptic number.

1213020223 is a deficient number, since it is larger than the sum of its proper divisors (804305).

1213020223 is an equidigital number, since it uses as much as digits as its factorization.

1213020223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804304.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1213020223 is about 34828.4398588280. The cubic root of 1213020223 is about 1066.4880996765.

Adding to 1213020223 its reverse (3220203121), we get a palindrome (4433223344).

The spelling of 1213020223 in words is "one billion, two hundred thirteen million, twenty thousand, two hundred twenty-three".