20133121201 has 4 divisors (see below), whose sum is σ = 20211460452. Its totient is φ = 20054781952.

The previous prime is 20133121181. The next prime is 20133121241. The reversal of 20133121201 is 10212133102.

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 18543902976 + 1589218225 = 136176^2 + 39865^2 .

It is a cyclic number.

It is not a de Polignac number, because 20133121201 - 2²¹ = 20131024049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20133121241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39169240 + ... + 39169753.

It is an arithmetic number, because the mean of its divisors is an integer number (5052865113).

Almost surely, 2^20133121201 is an apocalyptic number.

It is an amenable number.

20133121201 is a deficient number, since it is larger than the sum of its proper divisors (78339251).

20133121201 is an equidigital number, since it uses as much as digits as its factorization.

20133121201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78339250.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20133121201 its reverse (10212133102), we get a palindrome (30345254303).

The spelling of 20133121201 in words is "twenty billion, one hundred thirty-three million, one hundred twenty-one thousand, two hundred one".