1231322221200 has 480 divisors, whose sum is σ = 4055532429312. Its totient is φ = 319258368000.

The previous prime is 1231322221141. The next prime is 1231322221223. The reversal of 1231322221200 is 21222231321.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2779508179 + ... + 2779508621.

Almost surely, 2^{1231322221200} is an apocalyptic number.

1231322221200 is a gapful number since it is divisible by the number (10) 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 1231322221200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2027766214656).

1231322221200 is an abundant number, since it is smaller than the sum of its proper divisors (2824210208112).

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

1231322221200 is a wasteful number, since it uses less digits than its factorization.

1231322221200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903 (or 892 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 1231322221200 its reverse (21222231321), we get a palindrome (1252544452521).

The spelling of 1231322221200 in words is "one trillion, two hundred thirty-one billion, three hundred twenty-two million, two hundred twenty-one thousand, two hundred".