1201012001 has 6 divisors (see below), whose sum is σ = 1397095650. Its totient is φ = 1029438816.

The previous prime is 1201011991. The next prime is 1201012027. The reversal of 1201012001 is 1002101021.

It can be written as a sum of positive squares in only one way, i.e., 1125669601 + 75342400 = 33551^2 + 8680^2 .

It is not a de Polignac number, because 1201012001 - 2¹⁰ = 1201010977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1201012001.

It is not an unprimeable number, because it can be changed into a prime (1201012081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12255176 + ... + 12255273.

It is an arithmetic number, because the mean of its divisors is an integer number (232849275).

Almost surely, 2^1201012001 is an apocalyptic number.

It is an amenable number.

1201012001 is a deficient number, since it is larger than the sum of its proper divisors (196083649).

1201012001 is an equidigital number, since it uses as much as digits as its factorization.

1201012001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24510463 (or 24510456 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1201012001 is about 34655.6200492792. The cubic root of 1201012001 is about 1062.9572106731.

Adding to 1201012001 its reverse (1002101021), we get a palindrome (2203113022).

The spelling of 1201012001 in words is "one billion, two hundred one million, twelve thousand, one".