2001012222 has 32 divisors (see below), whose sum is σ = 4373055360. Its totient is φ = 605365920.

The previous prime is 2001012179. The next prime is 2001012229. The reversal of 2001012222 is 2222101002.

It is a junction number, because it is equal to n+sod(n) for n = 2001012198 and 2001012207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001012229) 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, 15729 + ... + 65187.

It is an arithmetic number, because the mean of its divisors is an integer number (136657980).

Almost surely, 2^2001012222 is an apocalyptic number.

2001012222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2001012222 is an abundant number, since it is smaller than the sum of its proper divisors (2372043138).

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

2001012222 is a wasteful number, since it uses less digits than its factorization.

2001012222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50088.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 2001012222 is about 44732.6751044469. The cubic root of 2001012222 is about 1260.1335673473.

Adding to 2001012222 its reverse (2222101002), we get a palindrome (4223113224).

The spelling of 2001012222 in words is "two billion, one million, twelve thousand, two hundred twenty-two".