1221231333200 has 30 divisors (see below), whose sum is σ = 2934008278974. Its totient is φ = 488492533120.

The previous prime is 1221231333187. The next prime is 1221231333211. The reversal of 1221231333200 is 23331321221.

It can be written as a sum of positive squares in 3 ways, for example, as 30714665536 + 1190516667664 = 175256^2 + 1091108^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1526538767 + ... + 1526539566.

Almost surely, 2^{1221231333200} is an apocalyptic number.

1221231333200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221231333200 is an abundant number, since it is smaller than the sum of its proper divisors (1712776945774).

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

1221231333200 is a wasteful number, since it uses less digits than its factorization.

1221231333200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3053078351 (or 3053078340 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 1221231333200 its reverse (23331321221), we get a palindrome (1244562654421).

The spelling of 1221231333200 in words is "one trillion, two hundred twenty-one billion, two hundred thirty-one million, three hundred thirty-three thousand, two hundred".