1213223200 has 72 divisors (see below), whose sum is σ = 3384908352. Its totient is φ = 415960320.

The previous prime is 1213223183. The next prime is 1213223233. The reversal of 1213223200 is 23223121.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102724 + ... + 113923.

It is an arithmetic number, because the mean of its divisors is an integer number (47012616).

Almost surely, 2^1213223200 is an apocalyptic number.

1213223200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213223200 is an abundant number, since it is smaller than the sum of its proper divisors (2171685152).

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

1213223200 is a wasteful number, since it uses less digits than its factorization.

1213223200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216674 (or 216661 counting only the distinct ones).

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

The square root of 1213223200 is about 34831.3536917531. The cubic root of 1213223200 is about 1066.5475821918.

Adding to 1213223200 its reverse (23223121), we get a palindrome (1236446321).

The spelling of 1213223200 in words is "one billion, two hundred thirteen million, two hundred twenty-three thousand, two hundred".