31130123069 has 2 divisors, whose sum is σ = 31130123070. Its totient is φ = 31130123068.

The previous prime is 31130123029. The next prime is 31130123117. The reversal of 31130123069 is 96032103113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27089868100 + 4040254969 = 164590^2 + 63563^2 .

It is a cyclic number.

It is not a de Polignac number, because 31130123069 - 2¹⁶ = 31130057533 is a prime.

It is a super-2 number, since 2×31130123069² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31130123029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15565061534 + 15565061535.

It is an arithmetic number, because the mean of its divisors is an integer number (15565061535).

Almost surely, 2^31130123069 is an apocalyptic number.

It is an amenable number.

31130123069 is a deficient number, since it is larger than the sum of its proper divisors (1).

31130123069 is an equidigital number, since it uses as much as digits as its factorization.

31130123069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 29.

The spelling of 31130123069 in words is "thirty-one billion, one hundred thirty million, one hundred twenty-three thousand, sixty-nine".