1001001223001 has 16 divisors (see below), whose sum is σ = 1088451970704. Its totient is φ = 915085000704.

The previous prime is 1001001222971. The next prime is 1001001223009. The reversal of 1001001223001 is 1003221001001.

It can be written as a sum of positive squares in 8 ways, for example, as 482053878601 + 518947344400 = 694301^2 + 720380^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001001223001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001001223009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 287936 + ... + 1443921.

It is an arithmetic number, because the mean of its divisors is an integer number (68028248169).

Almost surely, 2^{1001001223001} is an apocalyptic number.

It is an amenable number.

1001001223001 is a deficient number, since it is larger than the sum of its proper divisors (87450747703).

1001001223001 is a wasteful number, since it uses less digits than its factorization.

1001001223001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1732300.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 1001001223001 its reverse (1003221001001), we get a palindrome (2004222224002).

The spelling of 1001001223001 in words is "one trillion, one billion, one million, two hundred twenty-three thousand, one".