131220223 has 2 divisors, whose sum is σ = 131220224. Its totient is φ = 131220222.

The previous prime is 131220197. The next prime is 131220253. The reversal of 131220223 is 322022131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131220223 - 2⁵ = 131220191 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131220197 and 131220206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131220253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65610111 + 65610112.

It is an arithmetic number, because the mean of its divisors is an integer number (65610112).

Almost surely, 2^131220223 is an apocalyptic number.

131220223 is a deficient number, since it is larger than the sum of its proper divisors (1).

131220223 is an equidigital number, since it uses as much as digits as its factorization.

131220223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 131220223 is about 11455.1395888483. The cubic root of 131220223 is about 508.1597434571.

Adding to 131220223 its reverse (322022131), we get a palindrome (453242354).

The spelling of 131220223 in words is "one hundred thirty-one million, two hundred twenty thousand, two hundred twenty-three".