19220111 has 8 divisors (see below), whose sum is σ = 20127744. Its totient is φ = 18318520.

The previous prime is 19220099. The next prime is 19220129. The reversal of 19220111 is 11102291.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19220111 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 19220111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19220161) 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, 5810 + ... + 8496.

It is an arithmetic number, because the mean of its divisors is an integer number (2515968).

Almost surely, 2^19220111 is an apocalyptic number.

19220111 is a deficient number, since it is larger than the sum of its proper divisors (907633).

19220111 is a wasteful number, since it uses less digits than its factorization.

19220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3021.

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 19220111 is about 4384.0747028307. The cubic root of 19220111 is about 267.8666402288.

The spelling of 19220111 in words is "nineteen million, two hundred twenty thousand, one hundred eleven".