1001221232320 has 56 divisors (see below), whose sum is σ = 2466370429200. Its totient is φ = 386678541312.

The previous prime is 1001221232311. The next prime is 1001221232381. The reversal of 1001221232320 is 232321221001.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53935830 + ... + 53954389.

Almost surely, 2^{1001221232320} is an apocalyptic number.

1001221232320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001221232320 is an abundant number, since it is smaller than the sum of its proper divisors (1465149196880).

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

1001221232320 is a wasteful number, since it uses less digits than its factorization.

1001221232320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107890265 (or 107890255 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 1001221232320 its reverse (232321221001), we get a palindrome (1233542453321).

The spelling of 1001221232320 in words is "one trillion, one billion, two hundred twenty-one million, two hundred thirty-two thousand, three hundred twenty".