1001220122001 has 32 divisors (see below), whose sum is σ = 1487045950848. Its totient is φ = 594119024640.

The previous prime is 1001220121999. The next prime is 1001220122033. The reversal of 1001220122001 is 1002210221001.

It is not a de Polignac number, because 1001220122001 - 2¹ = 1001220121999 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1001220121001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1186816 + ... + 1846881.

It is an arithmetic number, because the mean of its divisors is an integer number (46470185964).

Almost surely, 2^{1001220122001} is an apocalyptic number.

1001220122001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1001220122001 is a deficient number, since it is larger than the sum of its proper divisors (485825828847).

1001220122001 is a wasteful number, since it uses less digits than its factorization.

1001220122001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3033921.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1001220122001 its reverse (1002210221001), we get a palindrome (2003430343002).

The spelling of 1001220122001 in words is "one trillion, one billion, two hundred twenty million, one hundred twenty-two thousand, one".