1001012201 has 8 divisors (see below), whose sum is σ = 1148087424. Its totient is φ = 854955360.

The previous prime is 1001012197. The next prime is 1001012203. The reversal of 1001012201 is 1022101001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1001012201 - 2² = 1001012197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001012203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252485 + ... + 256418.

It is an arithmetic number, because the mean of its divisors is an integer number (143510928).

Almost surely, 2^1001012201 is an apocalyptic number.

It is an amenable number.

1001012201 is a deficient number, since it is larger than the sum of its proper divisors (147075223).

1001012201 is an equidigital number, since it uses as much as digits as its factorization.

1001012201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509191.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1001012201 is about 31638.7768568888. The cubic root of 1001012201 is about 1000.3372865583.

Adding to 1001012201 its reverse (1022101001), we get a palindrome (2023113202).

The spelling of 1001012201 in words is "one billion, one million, twelve thousand, two hundred one".