131220222233 has 4 divisors (see below), whose sum is σ = 131228375040. Its totient is φ = 131212069428.

The previous prime is 131220222227. The next prime is 131220222247. The reversal of 131220222233 is 332222022131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 332222022131 = 467 ⋅711396193.

It is a cyclic number.

It is not a de Polignac number, because 131220222233 - 2⁶ = 131220222169 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131220222199 and 131220222208.

It is not an unprimeable number, because it can be changed into a prime (131220222223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4052213 + ... + 4084466.

It is an arithmetic number, because the mean of its divisors is an integer number (32807093760).

Almost surely, 2^131220222233 is an apocalyptic number.

It is an amenable number.

131220222233 is a deficient number, since it is larger than the sum of its proper divisors (8152807).

131220222233 is an equidigital number, since it uses as much as digits as its factorization.

131220222233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8152806.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 131220222233 its reverse (332222022131), we get a palindrome (463442244364).

The spelling of 131220222233 in words is "one hundred thirty-one billion, two hundred twenty million, two hundred twenty-two thousand, two hundred thirty-three".