1223013204 has 144 divisors (see below), whose sum is σ = 3742502400. Its totient is φ = 328961088.

The previous prime is 1223013191. The next prime is 1223013221. The reversal of 1223013204 is 4023103221.

It is a super-2 number, since 2×1223013204² = 2991522594316691232, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 856339 + ... + 857765.

It is an arithmetic number, because the mean of its divisors is an integer number (25989600).

Almost surely, 2^1223013204 is an apocalyptic number.

1223013204 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1223013204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1871251200).

1223013204 is an abundant number, since it is smaller than the sum of its proper divisors (2519489196).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1223013204 is a wasteful number, since it uses less digits than its factorization.

1223013204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1642 (or 1637 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1223013204 is about 34971.6056823246. The cubic root of 1223013204 is about 1069.4087058253.

Adding to 1223013204 its reverse (4023103221), we get a palindrome (5246116425).

The spelling of 1223013204 in words is "one billion, two hundred twenty-three million, thirteen thousand, two hundred four".