131221313223 has 192 divisors, whose sum is σ = 245728229376. Its totient is φ = 60559488000.

The previous prime is 131221313189. The next prime is 131221313287. The reversal of 131221313223 is 322313122131.

It is not a de Polignac number, because 131221313223 - 2⁹ = 131221312711 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131221313193 and 131221313202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131221314223) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 123443790 + ... + 123444852.

It is an arithmetic number, because the mean of its divisors is an integer number (1279834528).

Almost surely, 2^131221313223 is an apocalyptic number.

131221313223 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

131221313223 is a deficient number, since it is larger than the sum of its proper divisors (114506916153).

131221313223 is a wasteful number, since it uses less digits than its factorization.

131221313223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246 (or 1235 counting only the distinct ones).

The product of its digits is 1296, while the sum is 24.

Adding to 131221313223 its reverse (322313122131), we get a palindrome (453534435354).

It can be divided in two parts, 131221 and 313223, that added together give a palindrome (444444).

The spelling of 131221313223 in words is "one hundred thirty-one billion, two hundred twenty-one million, three hundred thirteen thousand, two hundred twenty-three".