1020131255173 has 2 divisors, whose sum is σ = 1020131255174. Its totient is φ = 1020131255172.

The previous prime is 1020131255153. The next prime is 1020131255189. The reversal of 1020131255173 is 3715521310201.

It is a happy number.

1020131255173 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 733176050049 + 286955205124 = 856257^2 + 535682^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020131255173 - 2⁵ = 1020131255141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020131255123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510065627586 + 510065627587.

It is an arithmetic number, because the mean of its divisors is an integer number (510065627587).

Almost surely, 2^{1020131255173} is an apocalyptic number.

It is an amenable number.

1020131255173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020131255173 is an equidigital number, since it uses as much as digits as its factorization.

1020131255173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6300, while the sum is 31.

Adding to 1020131255173 its reverse (3715521310201), we get a palindrome (4735652565374).

The spelling of 1020131255173 in words is "one trillion, twenty billion, one hundred thirty-one million, two hundred fifty-five thousand, one hundred seventy-three".