1001211223201 has 16 divisors (see below), whose sum is σ = 1166294245248. Its totient is φ = 841721126400.

The previous prime is 1001211223153. The next prime is 1001211223211. The reversal of 1001211223201 is 1023221121001.

It is not a de Polignac number, because 1001211223201 - 2²⁷ = 1001077005473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001211223211) 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, 3170455 + ... + 3471916.

It is an arithmetic number, because the mean of its divisors is an integer number (72893390328).

Almost surely, 2^{1001211223201} is an apocalyptic number.

It is an amenable number.

1001211223201 is a deficient number, since it is larger than the sum of its proper divisors (165083022047).

1001211223201 is an equidigital number, since it uses as much as digits as its factorization.

1001211223201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6642792.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1001211223201 its reverse (1023221121001), we get a palindrome (2024432344202).

The spelling of 1001211223201 in words is "one trillion, one billion, two hundred eleven million, two hundred twenty-three thousand, two hundred one".