131019904550321 has 2 divisors, whose sum is σ = 131019904550322. Its totient is φ = 131019904550320.

The previous prime is 131019904550309. The next prime is 131019904550329. The reversal of 131019904550321 is 123055409910131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124222616070400 + 6797288479921 = 11145520^2 + 2607161^2 .

It is a cyclic number.

It is not a de Polignac number, because 131019904550321 - 2³⁰ = 131018830808497 is a prime.

It is not a weakly prime, because it can be changed into another prime (131019904550329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65509952275160 + 65509952275161.

It is an arithmetic number, because the mean of its divisors is an integer number (65509952275161).

Almost surely, 2^{131019904550321} is an apocalyptic number.

It is an amenable number.

131019904550321 is a deficient number, since it is larger than the sum of its proper divisors (1).

131019904550321 is an equidigital number, since it uses as much as digits as its factorization.

131019904550321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145800, while the sum is 44.

The spelling of 131019904550321 in words is "one hundred thirty-one trillion, nineteen billion, nine hundred four million, five hundred fifty thousand, three hundred twenty-one".