131221030027 has 2 divisors, whose sum is σ = 131221030028. Its totient is φ = 131221030026.

The previous prime is 131221030009. The next prime is 131221030033. The reversal of 131221030027 is 720030122131.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131221030027 - 2¹⁹ = 131220505739 is a prime.

It is not a weakly prime, because it can be changed into another prime (131221030097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65610515013 + 65610515014.

It is an arithmetic number, because the mean of its divisors is an integer number (65610515014).

Almost surely, 2^131221030027 is an apocalyptic number.

131221030027 is a deficient number, since it is larger than the sum of its proper divisors (1).

131221030027 is an equidigital number, since it uses as much as digits as its factorization.

131221030027 is an evil number, because the sum of its binary digits is even.

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

Adding to 131221030027 its reverse (720030122131), we get a palindrome (851251152158).

The spelling of 131221030027 in words is "one hundred thirty-one billion, two hundred twenty-one million, thirty thousand, twenty-seven".