1231221223200 has 288 divisors, whose sum is σ = 4034579395392. Its totient is φ = 326121984000.

The previous prime is 1231221223117. The next prime is 1231221223217. The reversal of 1231221223200 is 23221221321.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 661590270 + ... + 661592130.

It is an arithmetic number, because the mean of its divisors is an integer number (14008956234).

Almost surely, 2^{1231221223200} is an apocalyptic number.

1231221223200 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 1231221223200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2017289697696).

1231221223200 is an abundant number, since it is smaller than the sum of its proper divisors (2803358172192).

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

1231221223200 is a wasteful number, since it uses less digits than its factorization.

1231221223200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3588 (or 3575 counting only the distinct ones).

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

Adding to 1231221223200 its reverse (23221221321), we get a palindrome (1254442444521).

The spelling of 1231221223200 in words is "one trillion, two hundred thirty-one billion, two hundred twenty-one million, two hundred twenty-three thousand, two hundred".