1020131255189 has 2 divisors, whose sum is σ = 1020131255190. Its totient is φ = 1020131255188.

The previous prime is 1020131255173. The next prime is 1020131255309. The reversal of 1020131255189 is 9815521310201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 649716602500 + 370414652689 = 806050^2 + 608617^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020131255189 - 2⁴ = 1020131255173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020131215189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510065627594 + 510065627595.

It is an arithmetic number, because the mean of its divisors is an integer number (510065627595).

Almost surely, 2^{1020131255189} is an apocalyptic number.

It is an amenable number.

1020131255189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020131255189 is an equidigital number, since it uses as much as digits as its factorization.

1020131255189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 38.

The spelling of 1020131255189 in words is "one trillion, twenty billion, one hundred thirty-one million, two hundred fifty-five thousand, one hundred eighty-nine".