999011212120111 has 8 divisors (see below), whose sum is σ = 1004135995670544. Its totient is φ = 993886970596800.

The previous prime is 999011212120109. The next prime is 999011212120151. The reversal of 999011212120111 is 111021212110999.

It is a happy number.

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 999011212120111 - 2¹ = 999011212120109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999011212120151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131810865 + ... + 139183786.

It is an arithmetic number, because the mean of its divisors is an integer number (125516999458818).

Almost surely, 2^{999011212120111} is an apocalyptic number.

999011212120111 is a deficient number, since it is larger than the sum of its proper divisors (5124783550433).

999011212120111 is a wasteful number, since it uses less digits than its factorization.

999011212120111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271013561.

The product of its (nonzero) digits is 5832, while the sum is 40.

The spelling of 999011212120111 in words is "nine hundred ninety-nine trillion, eleven billion, two hundred twelve million, one hundred twenty thousand, one hundred eleven".