131220333305 has 8 divisors (see below), whose sum is σ = 160045783944. Its totient is φ = 103255344000.

The previous prime is 131220333281. The next prime is 131220333313. The reversal of 131220333305 is 503333022131.

It can be written as a sum of positive squares in 4 ways, for example, as 2477152441 + 128743180864 = 49771^2 + 358808^2 .

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

It is not a de Polignac number, because 131220333305 - 2¹⁰ = 131220332281 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215114996 + ... + 215115605.

It is an arithmetic number, because the mean of its divisors is an integer number (20005722993).

Almost surely, 2^131220333305 is an apocalyptic number.

It is an amenable number.

131220333305 is a deficient number, since it is larger than the sum of its proper divisors (28825450639).

131220333305 is an equidigital number, since it uses as much as digits as its factorization.

131220333305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430230667.

The product of its (nonzero) digits is 4860, while the sum is 26.

Adding to 131220333305 its reverse (503333022131), we get a palindrome (634553355436).

The spelling of 131220333305 in words is "one hundred thirty-one billion, two hundred twenty million, three hundred thirty-three thousand, three hundred five".