16001222111 has 8 divisors (see below), whose sum is σ = 18300902400. Its totient is φ = 13704989688.

The previous prime is 16001222089. The next prime is 16001222117. The reversal of 16001222111 is 11122210061.

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 16001222111 - 2⁶ = 16001222047 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16001222111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16001222117) 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, 852011 + ... + 870588.

It is an arithmetic number, because the mean of its divisors is an integer number (2287612800).

Almost surely, 2^16001222111 is an apocalyptic number.

16001222111 is a deficient number, since it is larger than the sum of its proper divisors (2299680289).

16001222111 is a wasteful number, since it uses less digits than its factorization.

16001222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1723933.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 16001222111 its reverse (11122210061), we get a palindrome (27123432172).

The spelling of 16001222111 in words is "sixteen billion, one million, two hundred twenty-two thousand, one hundred eleven".