131222233231 has 4 divisors (see below), whose sum is σ = 131228298432. Its totient is φ = 131216168032.

The previous prime is 131222233187. The next prime is 131222233243. The reversal of 131222233231 is 132332222131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131222233231 - 2¹³ = 131222225039 is a prime.

It is a super-2 number, since 2×131222233231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131222233196 and 131222233205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131222233031) 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, 3000031 + ... + 3043456.

It is an arithmetic number, because the mean of its divisors is an integer number (32807074608).

Almost surely, 2^131222233231 is an apocalyptic number.

131222233231 is a deficient number, since it is larger than the sum of its proper divisors (6065201).

131222233231 is an equidigital number, since it uses as much as digits as its factorization.

131222233231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6065200.

The product of its digits is 2592, while the sum is 25.

Adding to 131222233231 its reverse (132332222131), we get a palindrome (263554455362).

The spelling of 131222233231 in words is "one hundred thirty-one billion, two hundred twenty-two million, two hundred thirty-three thousand, two hundred thirty-one".