2001222 has 24 divisors (see below), whose sum is σ = 4398264. Its totient is φ = 657504.

The previous prime is 2001211. The next prime is 2001229. The reversal of 2001222 is 2221002.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 553 + ... + 2075.

It is an arithmetic number, because the mean of its divisors is an integer number (183261).

2^2001222 is an apocalyptic number.

2001222 is an abundant number, since it is smaller than the sum of its proper divisors (2397042).

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

2001222 is a wasteful number, since it uses less digits than its factorization.

2001222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1604 (or 1601 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 2001222 is about 1414.6455386421. The cubic root of 2001222 is about 126.0177601571.

Adding to 2001222 its reverse (2221002), we get a palindrome (4222224).

The spelling of 2001222 in words is "two million, one thousand, two hundred twenty-two".