16991011101121 has 8 divisors (see below), whose sum is σ = 17002502343360. Its totient is φ = 16979523559152.

The previous prime is 16991011101019. The next prime is 16991011101137. The reversal of 16991011101121 is 12110111019961.

16991011101121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 16991011101121 - 2²³ = 16991002712513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16991011101161) 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, 8292715 + ... + 10136623.

It is an arithmetic number, because the mean of its divisors is an integer number (2125312792920).

Almost surely, 2^{16991011101121} is an apocalyptic number.

It is an amenable number.

16991011101121 is a deficient number, since it is larger than the sum of its proper divisors (11491242239).

16991011101121 is a wasteful number, since it uses less digits than its factorization.

16991011101121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1850135.

The product of its (nonzero) digits is 972, while the sum is 34.

The spelling of 16991011101121 in words is "sixteen trillion, nine hundred ninety-one billion, eleven million, one hundred one thousand, one hundred twenty-one".