1201123001 has 8 divisors (see below), whose sum is σ = 1314723144. Its totient is φ = 1090552320.

The previous prime is 1201122983. The next prime is 1201123051. The reversal of 1201123001 is 1003211021.

It can be written as a sum of positive squares in 4 ways, for example, as 128232976 + 1072890025 = 11324^2 + 32755^2 .

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

It is not a de Polignac number, because 1201123001 - 2²² = 1196928697 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 (1201123051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 756536 + ... + 758121.

It is an arithmetic number, because the mean of its divisors is an integer number (164340393).

Almost surely, 2^1201123001 is an apocalyptic number.

It is an amenable number.

1201123001 is a deficient number, since it is larger than the sum of its proper divisors (113600143).

1201123001 is a wasteful number, since it uses less digits than its factorization.

1201123001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1514731.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1201123001 is about 34657.2214841294. The cubic root of 1201123001 is about 1062.9899565617.

Adding to 1201123001 its reverse (1003211021), we get a palindrome (2204334022).

The spelling of 1201123001 in words is "one billion, two hundred one million, one hundred twenty-three thousand, one".