1031020312081 has 2 divisors, whose sum is σ = 1031020312082. Its totient is φ = 1031020312080.

The previous prime is 1031020312027. The next prime is 1031020312097. The reversal of 1031020312081 is 1802130201301.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 867848749056 + 163171563025 = 931584^2 + 403945^2 .

It is a cyclic number.

It is not a de Polignac number, because 1031020312081 - 2³¹ = 1028872828433 is a prime.

It is a super-2 number, since 2×1031020312081² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1031020310081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515510156040 + 515510156041.

It is an arithmetic number, because the mean of its divisors is an integer number (515510156041).

Almost surely, 2^{1031020312081} is an apocalyptic number.

It is an amenable number.

1031020312081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031020312081 is an equidigital number, since it uses as much as digits as its factorization.

1031020312081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 1031020312081 its reverse (1802130201301), we get a palindrome (2833150513382).

The spelling of 1031020312081 in words is "one trillion, thirty-one billion, twenty million, three hundred twelve thousand, eighty-one".