2001221120143 has 32 divisors (see below), whose sum is σ = 2400295016448. Its totient is φ = 1632718406400.

The previous prime is 2001221120141. The next prime is 2001221120153. The reversal of 2001221120143 is 3410211221002.

It is a cyclic number.

It is not a de Polignac number, because 2001221120143 - 2¹ = 2001221120141 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2001221120143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001221120141) 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, 4042008 + ... + 4510018.

It is an arithmetic number, because the mean of its divisors is an integer number (75009219264).

Almost surely, 2^{2001221120143} is an apocalyptic number.

2001221120143 is a deficient number, since it is larger than the sum of its proper divisors (399073896305).

2001221120143 is a wasteful number, since it uses less digits than its factorization.

2001221120143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468423.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 2001221120143 its reverse (3410211221002), we get a palindrome (5411432341145).

The spelling of 2001221120143 in words is "two trillion, one billion, two hundred twenty-one million, one hundred twenty thousand, one hundred forty-three".