1213223004 has 72 divisors (see below), whose sum is σ = 3625745760. Its totient is φ = 334680192.

The previous prime is 1213222949. The next prime is 1213223029. The reversal of 1213223004 is 4003223121.

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 23 ways as a sum of consecutive naturals, for example, 75699 + ... + 90314.

It is an arithmetic number, because the mean of its divisors is an integer number (50357580).

Almost surely, 2^1213223004 is an apocalyptic number.

1213223004 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1213223004 is an abundant number, since it is smaller than the sum of its proper divisors (2412522756).

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

1213223004 is a wasteful number, since it uses less digits than its factorization.

1213223004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166059 (or 166054 counting only the distinct ones).

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

The square root of 1213223004 is about 34831.3508781959. The cubic root of 1213223004 is about 1066.5475247571.

Adding to 1213223004 its reverse (4003223121), we get a palindrome (5216446125).

The spelling of 1213223004 in words is "one billion, two hundred thirteen million, two hundred twenty-three thousand, four".