1213204223 has 32 divisors (see below), whose sum is σ = 1536012288. Its totient is φ = 930816000.

The previous prime is 1213204219. The next prime is 1213204243. The reversal of 1213204223 is 3224023121.

It is not a de Polignac number, because 1213204223 - 2² = 1213204219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213204195 and 1213204204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213204243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1998386 + ... + 1998992.

It is an arithmetic number, because the mean of its divisors is an integer number (48000384).

Almost surely, 2^1213204223 is an apocalyptic number.

1213204223 is a deficient number, since it is larger than the sum of its proper divisors (322808065).

1213204223 is a wasteful number, since it uses less digits than its factorization.

1213204223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1213204223 is about 34831.0812780769. The cubic root of 1213204223 is about 1066.5420212533.

Adding to 1213204223 its reverse (3224023121), we get a palindrome (4437227344).

The spelling of 1213204223 in words is "one billion, two hundred thirteen million, two hundred four thousand, two hundred twenty-three".