201121101331 has 4 divisors (see below), whose sum is σ = 201681327600. Its totient is φ = 200560875064.

The previous prime is 201121101271. The next prime is 201121101341. The reversal of 201121101331 is 133101121102.

It is a happy number.

201121101331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133101121102 = 2 ⋅66550560551.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201121101331 is a prime.

It is a super-2 number, since 2×201121101331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201121101341) 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 3 ways as a sum of consecutive naturals, for example, 280112596 + ... + 280113313.

It is an arithmetic number, because the mean of its divisors is an integer number (50420331900).

Almost surely, 2^201121101331 is an apocalyptic number.

201121101331 is a deficient number, since it is larger than the sum of its proper divisors (560226269).

201121101331 is an equidigital number, since it uses as much as digits as its factorization.

201121101331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560226268.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 201121101331 its reverse (133101121102), we get a palindrome (334222222433).

The spelling of 201121101331 in words is "two hundred one billion, one hundred twenty-one million, one hundred one thousand, three hundred thirty-one".