1002201001 has 4 divisors (see below), whose sum is σ = 1002265092. Its totient is φ = 1002136912.

The previous prime is 1002200987. The next prime is 1002201041. The reversal of 1002201001 is 1001022001.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 685182976 + 317018025 = 26176^2 + 17805^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002201001 - 2¹³ = 1002192809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1002201041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8571 + ... + 45583.

It is an arithmetic number, because the mean of its divisors is an integer number (250566273).

Almost surely, 2^1002201001 is an apocalyptic number.

It is an amenable number.

1002201001 is a deficient number, since it is larger than the sum of its proper divisors (64091).

1002201001 is an equidigital number, since it uses as much as digits as its factorization.

1002201001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64090.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 1002201001 is about 31657.5583549964. The cubic root of 1002201001 is about 1000.7331293900.

Adding to 1002201001 its reverse (1001022001), we get a palindrome (2003223002).

The spelling of 1002201001 in words is "one billion, two million, two hundred one thousand, one".