201331332121 has 4 divisors (see below), whose sum is σ = 201332247732. Its totient is φ = 201330416512.

The previous prime is 201331332107. The next prime is 201331332133. The reversal of 201331332121 is 121233133102.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 53155608025 + 148175724096 = 230555^2 + 384936^2 .

It is a cyclic number.

It is not a de Polignac number, because 201331332121 - 2⁵ = 201331332089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201331332092 and 201331332101.

It is not an unprimeable number, because it can be changed into a prime (201331332221) 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, 92625 + ... + 641281.

It is an arithmetic number, because the mean of its divisors is an integer number (50333061933).

Almost surely, 2^201331332121 is an apocalyptic number.

It is an amenable number.

201331332121 is a deficient number, since it is larger than the sum of its proper divisors (915611).

201331332121 is an equidigital number, since it uses as much as digits as its factorization.

201331332121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915610.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 201331332121 its reverse (121233133102), we get a palindrome (322564465223).

The spelling of 201331332121 in words is "two hundred one billion, three hundred thirty-one million, three hundred thirty-two thousand, one hundred twenty-one".