1201002001 has 8 divisors (see below), whose sum is σ = 1221101024. Its totient is φ = 1180967040.

The previous prime is 1201001987. The next prime is 1201002013. The reversal of 1201002001 is 1002001021.

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

It is a cyclic number.

It is not a de Polignac number, because 1201002001 - 2¹⁷ = 1200870929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201002071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22561 + ... + 53953.

It is an arithmetic number, because the mean of its divisors is an integer number (152637628).

Almost surely, 2^1201002001 is an apocalyptic number.

It is an amenable number.

1201002001 is a deficient number, since it is larger than the sum of its proper divisors (20099023).

1201002001 is an equidigital number, since it uses as much as digits as its factorization.

1201002001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32031.

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

The square root of 1201002001 is about 34655.4757722355. The cubic root of 1201002001 is about 1062.9542604940.

Adding to 1201002001 its reverse (1002001021), we get a palindrome (2203003022).

The spelling of 1201002001 in words is "one billion, two hundred one million, two thousand, one".