3311132120221 has 4 divisors (see below), whose sum is σ = 3314665880092. Its totient is φ = 3307598360352.

The previous prime is 3311132120183. The next prime is 3311132120243. The reversal of 3311132120221 is 1220212311133.

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 1073896964100 + 2237235156121 = 1036290^2 + 1495739^2 .

It is a cyclic number.

It is not a de Polignac number, because 3311132120221 - 2³³ = 3302542185629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3311132120192 and 3311132120201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3311132120281) 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, 1766878530 + ... + 1766880403.

It is an arithmetic number, because the mean of its divisors is an integer number (828666470023).

Almost surely, 2^{3311132120221} is an apocalyptic number.

It is an amenable number.

3311132120221 is a deficient number, since it is larger than the sum of its proper divisors (3533759871).

3311132120221 is an equidigital number, since it uses as much as digits as its factorization.

3311132120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3533759870.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 3311132120221 its reverse (1220212311133), we get a palindrome (4531344431354).

The spelling of 3311132120221 in words is "three trillion, three hundred eleven billion, one hundred thirty-two million, one hundred twenty thousand, two hundred twenty-one".