999999951111311 has 2 divisors, whose sum is σ = 999999951111312. Its totient is φ = 999999951111310.

The previous prime is 999999951111281. The next prime is 999999951111383. The reversal of 999999951111311 is 113111159999999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999999951111311 - 2⁴⁶ = 929631206933647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999999951111611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999975555655 + 499999975555656.

It is an arithmetic number, because the mean of its divisors is an integer number (499999975555656).

Almost surely, 2^{999999951111311} is an apocalyptic number.

999999951111311 is a deficient number, since it is larger than the sum of its proper divisors (1).

999999951111311 is an equidigital number, since it uses as much as digits as its factorization.

999999951111311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 71744535, while the sum is 77.

The spelling of 999999951111311 in words is "nine hundred ninety-nine trillion, nine hundred ninety-nine billion, nine hundred fifty-one million, one hundred eleven thousand, three hundred eleven".