1201020133 has 4 divisors (see below), whose sum is σ = 1205294508. Its totient is φ = 1196745760.

The previous prime is 1201020127. The next prime is 1201020137. The reversal of 1201020133 is 3310201021.

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 964537249 + 236482884 = 31057^2 + 15378^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201020133 - 2⁵ = 1201020101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201020137) 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, 2136766 + ... + 2137327.

It is an arithmetic number, because the mean of its divisors is an integer number (301323627).

Almost surely, 2^1201020133 is an apocalyptic number.

It is an amenable number.

1201020133 is a deficient number, since it is larger than the sum of its proper divisors (4274375).

1201020133 is an equidigital number, since it uses as much as digits as its factorization.

1201020133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4274374.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1201020133 is about 34655.7373749283. The cubic root of 1201020133 is about 1062.9596097467.

Adding to 1201020133 its reverse (3310201021), we get a palindrome (4511221154).

The spelling of 1201020133 in words is "one billion, two hundred one million, twenty thousand, one hundred thirty-three".