2122218749 has 8 divisors (see below), whose sum is σ = 2568063168. Its totient is φ = 1712041920.

The previous prime is 2122218713. The next prime is 2122218751. The reversal of 2122218749 is 9478122212.

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-2122218749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122212749) 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, 8916767 + ... + 8917004.

It is an arithmetic number, because the mean of its divisors is an integer number (321007896).

Almost surely, 2^2122218749 is an apocalyptic number.

It is an amenable number.

2122218749 is a deficient number, since it is larger than the sum of its proper divisors (445844419).

2122218749 is a wasteful number, since it uses less digits than its factorization.

2122218749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17833795.

The product of its digits is 32256, while the sum is 38.

The square root of 2122218749 is about 46067.5455065711. The cubic root of 2122218749 is about 1285.0796579384.

The spelling of 2122218749 in words is "two billion, one hundred twenty-two million, two hundred eighteen thousand, seven hundred forty-nine".