19991121111002 has 8 divisors (see below), whose sum is σ = 29993722459200. Its totient is φ = 9993213624604.

The previous prime is 19991121110971. The next prime is 19991121111029. The reversal of 19991121111002 is 20011112119991.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1173454802 + ... + 1173471837.

It is an arithmetic number, because the mean of its divisors is an integer number (3749215307400).

Almost surely, 2^{19991121111002} is an apocalyptic number.

19991121111002 is a deficient number, since it is larger than the sum of its proper divisors (10002601348198).

19991121111002 is a wasteful number, since it uses less digits than its factorization.

19991121111002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2346930900.

The product of its (nonzero) digits is 2916, while the sum is 38.

The spelling of 19991121111002 in words is "nineteen trillion, nine hundred ninety-one billion, one hundred twenty-one million, one hundred eleven thousand, two".