1331301221221 has 8 divisors (see below), whose sum is σ = 1335217410720. Its totient is φ = 1327385489808.

The previous prime is 1331301221209. The next prime is 1331301221233. The reversal of 1331301221221 is 1221221031331.

It is an interprime number because it is at equal distance from previous prime (1331301221209) and next prime (1331301221233).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1331301221221 - 2²⁷ = 1331167003493 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1331301221192 and 1331301221201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331301221291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6220230 + ... + 6430696.

It is an arithmetic number, because the mean of its divisors is an integer number (166902176340).

Almost surely, 2^{1331301221221} is an apocalyptic number.

It is an amenable number.

1331301221221 is a deficient number, since it is larger than the sum of its proper divisors (3916189499).

1331301221221 is a wasteful number, since it uses less digits than its factorization.

1331301221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229043.

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

Adding to 1331301221221 its reverse (1221221031331), we get a palindrome (2552522252552).

The spelling of 1331301221221 in words is "one trillion, three hundred thirty-one billion, three hundred one million, two hundred twenty-one thousand, two hundred twenty-one".