201220244001 has 24 divisors (see below), whose sum is σ = 341150756544. Its totient is φ = 111875346720.

The previous prime is 201220243999. The next prime is 201220244009. The reversal of 201220244001 is 100442022102.

201220244001 is a `hidden beast` number, since 2 + 0 + 1 + 220 + 2 + 440 + 0 + 1 = 666.

It is not a de Polignac number, because 201220244001 - 2¹ = 201220243999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201220244009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43159455 + ... + 43164116.

It is an arithmetic number, because the mean of its divisors is an integer number (14214614856).

Almost surely, 2^201220244001 is an apocalyptic number.

201220244001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

201220244001 is a deficient number, since it is larger than the sum of its proper divisors (139930512543).

201220244001 is a wasteful number, since it uses less digits than its factorization.

201220244001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86323621 (or 86323618 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 201220244001 its reverse (100442022102), we get a palindrome (301662266103).

The spelling of 201220244001 in words is "two hundred one billion, two hundred twenty million, two hundred forty-four thousand, one".