1213404223 has 4 divisors (see below), whose sum is σ = 1284780960. Its totient is φ = 1142027488.

The previous prime is 1213404221. The next prime is 1213404251. The reversal of 1213404223 is 3224043121.

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 1213404223 - 2¹ = 1213404221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213404194 and 1213404203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213404221) 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, 35688343 + ... + 35688376.

It is an arithmetic number, because the mean of its divisors is an integer number (321195240).

Almost surely, 2^1213404223 is an apocalyptic number.

1213404223 is a deficient number, since it is larger than the sum of its proper divisors (71376737).

1213404223 is an equidigital number, since it uses as much as digits as its factorization.

1213404223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71376736.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1213404223 is about 34833.9521587775. The cubic root of 1213404223 is about 1066.6006254794.

Adding to 1213404223 its reverse (3224043121), we get a palindrome (4437447344).

The spelling of 1213404223 in words is "one billion, two hundred thirteen million, four hundred four thousand, two hundred twenty-three".