1321201133 has 4 divisors (see below), whose sum is σ = 1509944160. Its totient is φ = 1132458108.

The previous prime is 1321201127. The next prime is 1321201139. The reversal of 1321201133 is 3311021231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1321201127) and next prime (1321201139).

It is a cyclic number.

It is not a de Polignac number, because 1321201133 - 2⁸ = 1321200877 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 (1321201139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94371503 + ... + 94371516.

It is an arithmetic number, because the mean of its divisors is an integer number (377486040).

Almost surely, 2^1321201133 is an apocalyptic number.

It is an amenable number.

1321201133 is a deficient number, since it is larger than the sum of its proper divisors (188743027).

1321201133 is an equidigital number, since it uses as much as digits as its factorization.

1321201133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188743026.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1321201133 is about 36348.3305393797. The cubic root of 1321201133 is about 1097.2939359873.

Adding to 1321201133 its reverse (3311021231), we get a palindrome (4632222364).

The spelling of 1321201133 in words is "one billion, three hundred twenty-one million, two hundred one thousand, one hundred thirty-three".