2122218381 has 16 divisors (see below), whose sum is σ = 2847513600. Its totient is φ = 1405884480.

The previous prime is 2122218331. The next prime is 2122218383. The reversal of 2122218381 is 1838122212.

It is not a de Polignac number, because 2122218381 - 2⁷ = 2122218253 is a prime.

It is a super-2 number, since 2×2122218381² = 9007621713308522322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122218383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 831295 + ... + 833843.

It is an arithmetic number, because the mean of its divisors is an integer number (177969600).

Almost surely, 2^2122218381 is an apocalyptic number.

It is an amenable number.

2122218381 is a deficient number, since it is larger than the sum of its proper divisors (725295219).

2122218381 is a wasteful number, since it uses less digits than its factorization.

2122218381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4196.

The product of its digits is 3072, while the sum is 30.

The square root of 2122218381 is about 46067.5415124358. The cubic root of 2122218381 is about 1285.0795836593.

The spelling of 2122218381 in words is "two billion, one hundred twenty-two million, two hundred eighteen thousand, three hundred eighty-one".