999987753321111 has 8 divisors (see below), whose sum is σ = 1336410547363584. Its totient is φ = 665111730746360.

The previous prime is 999987753321097. The next prime is 999987753321143. The reversal of 999987753321111 is 111123357789999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 999987753321111 - 2⁴² = 995589706810007 is a prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999987753321211) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 386692865421 + ... + 386692868006.

It is an arithmetic number, because the mean of its divisors is an integer number (167051318420448).

Almost surely, 2^{999987753321111} is an apocalyptic number.

999987753321111 is a deficient number, since it is larger than the sum of its proper divisors (336422794042473).

999987753321111 is a wasteful number, since it uses less digits than its factorization.

999987753321111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773385733861.

The product of its digits is 231472080, while the sum is 75.

The spelling of 999987753321111 in words is "nine hundred ninety-nine trillion, nine hundred eighty-seven billion, seven hundred fifty-three million, three hundred twenty-one thousand, one hundred eleven".