1213223330400 has 72 divisors (see below), whose sum is σ = 3949041948264. Its totient is φ = 323526220800.

The previous prime is 1213223330399. The next prime is 1213223330503. The reversal of 1213223330400 is 40333223121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

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, 252752461 + ... + 252757260.

It is an arithmetic number, because the mean of its divisors is an integer number (54847804837).

Almost surely, 2^{1213223330400} is an apocalyptic number.

1213223330400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213223330400 is an abundant number, since it is smaller than the sum of its proper divisors (2735818617864).

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

1213223330400 is a wasteful number, since it uses less digits than its factorization.

1213223330400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505509744 (or 505509731 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 1213223330400 its reverse (40333223121), we get a palindrome (1253556553521).

The spelling of 1213223330400 in words is "one trillion, two hundred thirteen billion, two hundred twenty-three million, three hundred thirty thousand, four hundred".