1001225001 has 16 divisors (see below), whose sum is σ = 1539938304. Its totient is φ = 566780304.

The previous prime is 1001224997. The next prime is 1001225033. The reversal of 1001225001 is 1005221001.

It is not a de Polignac number, because 1001225001 - 2² = 1001224997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1001220001) 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 15 ways as a sum of consecutive naturals, for example, 220545 + ... + 225038.

It is an arithmetic number, because the mean of its divisors is an integer number (96246144).

Almost surely, 2^1001225001 is an apocalyptic number.

It is an amenable number.

1001225001 is a deficient number, since it is larger than the sum of its proper divisors (538713303).

1001225001 is a wasteful number, since it uses less digits than its factorization.

1001225001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445700.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 1001225001 is about 31642.1396400433. The cubic root of 1001225001 is about 1000.4081670437.

Adding to 1001225001 its reverse (1005221001), we get a palindrome (2006446002).

The spelling of 1001225001 in words is "one billion, one million, two hundred twenty-five thousand, one".