1002001022201 has 4 divisors (see below), whose sum is σ = 1002005280612. Its totient is φ = 1001996763792.

The previous prime is 1002001022177. The next prime is 1002001022219. The reversal of 1002001022201 is 1022201002001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 625244444176 + 376756578025 = 790724^2 + 613805^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1002001022201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1002001022401) 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, 1754246 + ... + 2254191.

It is an arithmetic number, because the mean of its divisors is an integer number (250501320153).

Almost surely, 2^{1002001022201} is an apocalyptic number.

It is an amenable number.

1002001022201 is a deficient number, since it is larger than the sum of its proper divisors (4258411).

1002001022201 is an equidigital number, since it uses as much as digits as its factorization.

1002001022201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4258410.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1002001022201 its reverse (1022201002001), we get a palindrome (2024202024202).

The spelling of 1002001022201 in words is "one trillion, two billion, one million, twenty-two thousand, two hundred one".