131193354221 has 2 divisors, whose sum is σ = 131193354222. Its totient is φ = 131193354220.

The previous prime is 131193354181. The next prime is 131193354287. The reversal of 131193354221 is 122453391131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115386578596 + 15806775625 = 339686^2 + 125725^2 .

It is a cyclic number.

It is not a de Polignac number, because 131193354221 - 2⁶ = 131193354157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131190354221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65596677110 + 65596677111.

It is an arithmetic number, because the mean of its divisors is an integer number (65596677111).

Almost surely, 2^131193354221 is an apocalyptic number.

It is an amenable number.

131193354221 is a deficient number, since it is larger than the sum of its proper divisors (1).

131193354221 is an equidigital number, since it uses as much as digits as its factorization.

131193354221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 35.

The spelling of 131193354221 in words is "one hundred thirty-one billion, one hundred ninety-three million, three hundred fifty-four thousand, two hundred twenty-one".