999999010101031 has 2 divisors, whose sum is σ = 999999010101032. Its totient is φ = 999999010101030.

The previous prime is 999999010101023. The next prime is 999999010101067. The reversal of 999999010101031 is 130101010999999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999999010101031 - 2³ = 999999010101023 is a prime.

It is a super-2 number, since 2×999999010101031² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999999010105031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999505050515 + 499999505050516.

It is an arithmetic number, because the mean of its divisors is an integer number (499999505050516).

Almost surely, 2^{999999010101031} is an apocalyptic number.

999999010101031 is a deficient number, since it is larger than the sum of its proper divisors (1).

999999010101031 is an equidigital number, since it uses as much as digits as its factorization.

999999010101031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1594323, while the sum is 61.

The spelling of 999999010101031 in words is "nine hundred ninety-nine trillion, nine hundred ninety-nine billion, ten million, one hundred one thousand, thirty-one".