1020775731631 has 2 divisors, whose sum is σ = 1020775731632. Its totient is φ = 1020775731630.

The previous prime is 1020775731593. The next prime is 1020775731637. The reversal of 1020775731631 is 1361375770201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1020775731631 - 2³¹ = 1018628247983 is a prime.

It is a super-2 number, since 2×1020775731631² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020775731637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510387865815 + 510387865816.

It is an arithmetic number, because the mean of its divisors is an integer number (510387865816).

Almost surely, 2^{1020775731631} is an apocalyptic number.

1020775731631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020775731631 is an equidigital number, since it uses as much as digits as its factorization.

1020775731631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 185220, while the sum is 43.

The spelling of 1020775731631 in words is "one trillion, twenty billion, seven hundred seventy-five million, seven hundred thirty-one thousand, six hundred thirty-one".