999987753321211 has 2 divisors, whose sum is σ = 999987753321212. Its totient is φ = 999987753321210.

The previous prime is 999987753321173. The next prime is 999987753321253. The reversal of 999987753321211 is 112123357789999.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999987753321211 is a prime.

It is not a weakly prime, because it can be changed into another prime (999987753321311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499993876660605 + 499993876660606.

It is an arithmetic number, because the mean of its divisors is an integer number (499993876660606).

Almost surely, 2^{999987753321211} is an apocalyptic number.

999987753321211 is a deficient number, since it is larger than the sum of its proper divisors (1).

999987753321211 is an equidigital number, since it uses as much as digits as its factorization.

999987753321211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 462944160, while the sum is 76.

The spelling of 999987753321211 in words is "nine hundred ninety-nine trillion, nine hundred eighty-seven billion, seven hundred fifty-three million, three hundred twenty-one thousand, two hundred eleven".