1001220323240 has 32 divisors (see below), whose sum is σ = 2258627604480. Its totient is φ = 399442462272.

The previous prime is 1001220323221. The next prime is 1001220323249. The reversal of 1001220323240 is 423230221001.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (1001220323249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32661584 + ... + 32692223.

It is an arithmetic number, because the mean of its divisors is an integer number (70582112640).

Almost surely, 2^{1001220323240} is an apocalyptic number.

1001220323240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001220323240 is an abundant number, since it is smaller than the sum of its proper divisors (1257407281240).

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

1001220323240 is a wasteful number, since it uses less digits than its factorization.

1001220323240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65354201 (or 65354197 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 1001220323240 its reverse (423230221001), we get a palindrome (1424450544241).

The spelling of 1001220323240 in words is "one trillion, one billion, two hundred twenty million, three hundred twenty-three thousand, two hundred forty".