1001201201001 has 16 divisors (see below), whose sum is σ = 1483281633600. Its totient is φ = 667458199584.

The previous prime is 1001201200997. The next prime is 1001201201017. The reversal of 1001201201001 is 1001021021001.

It is a happy number.

It is not a de Polignac number, because 1001201201001 - 2² = 1001201200997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1001201201041) 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, 2123485 + ... + 2551781.

It is an arithmetic number, because the mean of its divisors is an integer number (92705102100).

Almost surely, 2^{1001201201001} is an apocalyptic number.

It is an amenable number.

1001201201001 is a deficient number, since it is larger than the sum of its proper divisors (482080432599).

1001201201001 is an equidigital number, since it uses as much as digits as its factorization.

1001201201001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514885 (or 514879 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1001201201001 its reverse (1001021021001), we get a palindrome (2002222222002).

The spelling of 1001201201001 in words is "one trillion, one billion, two hundred one million, two hundred one thousand, one".