131221327 has 2 divisors, whose sum is σ = 131221328. Its totient is φ = 131221326.

The previous prime is 131221313. The next prime is 131221339. The reversal of 131221327 is 723122131.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131221327 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 131221298 and 131221307.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131251327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65610663 + 65610664.

It is an arithmetic number, because the mean of its divisors is an integer number (65610664).

Almost surely, 2^131221327 is an apocalyptic number.

131221327 is a deficient number, since it is larger than the sum of its proper divisors (1).

131221327 is an equidigital number, since it uses as much as digits as its factorization.

131221327 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504, while the sum is 22.

The square root of 131221327 is about 11455.1877767237. The cubic root of 131221327 is about 508.1611685595.

Adding to 131221327 its reverse (723122131), we get a palindrome (854343458).

The spelling of 131221327 in words is "one hundred thirty-one million, two hundred twenty-one thousand, three hundred twenty-seven".