131122220441 has 4 divisors (see below), whose sum is σ = 131124749412. Its totient is φ = 131119691472.

The previous prime is 131122220407. The next prime is 131122220479. The reversal of 131122220441 is 144022221131.

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 38038651225 + 93083569216 = 195035^2 + 305096^2 .

It is a cyclic number.

It is not a de Polignac number, because 131122220441 - 2⁶ = 131122220377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131122220941) 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, 1185050 + ... + 1290963.

It is an arithmetic number, because the mean of its divisors is an integer number (32781187353).

Almost surely, 2^131122220441 is an apocalyptic number.

It is an amenable number.

131122220441 is a deficient number, since it is larger than the sum of its proper divisors (2528971).

131122220441 is an equidigital number, since it uses as much as digits as its factorization.

131122220441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2528970.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 131122220441 its reverse (144022221131), we get a palindrome (275144441572).

The spelling of 131122220441 in words is "one hundred thirty-one billion, one hundred twenty-two million, two hundred twenty thousand, four hundred forty-one".