1001220120201 has 16 divisors (see below), whose sum is σ = 1525931941248. Its totient is φ = 572027088000.

The previous prime is 1001220120157. The next prime is 1001220120217. The reversal of 1001220120201 is 1020210221001.

It is not a de Polignac number, because 1001220120201 - 2⁶ = 1001220120137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1001220120401) 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, 3987570 + ... + 4231211.

It is an arithmetic number, because the mean of its divisors is an integer number (95370746328).

Almost surely, 2^{1001220120201} is an apocalyptic number.

It is an amenable number.

1001220120201 is a deficient number, since it is larger than the sum of its proper divisors (524711821047).

1001220120201 is an equidigital number, since it uses as much as digits as its factorization.

1001220120201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8224592.

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

Adding to 1001220120201 its reverse (1020210221001), we get a palindrome (2021430341202).

The spelling of 1001220120201 in words is "one trillion, one billion, two hundred twenty million, one hundred twenty thousand, two hundred one".