1216017222 has 96 divisors (see below), whose sum is σ = 3047860224. Its totient is φ = 321552000.

The previous prime is 1216017221. The next prime is 1216017223. The reversal of 1216017222 is 2227106121.

1216017222 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1216017221) and next prime (1216017223).

It is a junction number, because it is equal to n+sod(n) for n = 1216017192 and 1216017201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216017221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 206722 + ... + 212522.

It is an arithmetic number, because the mean of its divisors is an integer number (31748544).

Almost surely, 2^1216017222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1216017222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1523930112).

1216017222 is an abundant number, since it is smaller than the sum of its proper divisors (1831843002).

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

1216017222 is a wasteful number, since it uses less digits than its factorization.

1216017222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5874 (or 5867 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 1216017222 is about 34871.4384848116. The cubic root of 1216017222 is about 1067.3656984138.

The spelling of 1216017222 in words is "one billion, two hundred sixteen million, seventeen thousand, two hundred twenty-two".