2191220922 has 16 divisors (see below), whose sum is σ = 4780845792. Its totient is φ = 664006320.

The previous prime is 2191220909. The next prime is 2191220929. The reversal of 2191220922 is 2290221912.

It is a self number, because there is not a number n which added to its sum of digits gives 2191220922.

It is not an unprimeable number, because it can be changed into a prime (2191220929) 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, 16600093 + ... + 16600224.

It is an arithmetic number, because the mean of its divisors is an integer number (298802862).

Almost surely, 2^2191220922 is an apocalyptic number.

2191220922 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2191220922 is an abundant number, since it is smaller than the sum of its proper divisors (2589624870).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2191220922 is a wasteful number, since it uses less digits than its factorization.

2191220922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33200333.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 2191220922 is about 46810.4787627728. The cubic root of 2191220922 is about 1298.8591415006.

The spelling of 2191220922 in words is "two billion, one hundred ninety-one million, two hundred twenty thousand, nine hundred twenty-two".