201021222 has 24 divisors (see below), whose sum is σ = 413219016. Its totient is φ = 65193408.

The previous prime is 201021211. The next prime is 201021229. The reversal of 201021222 is 222120102.

It is a junction number, because it is equal to n+sod(n) for n = 201021198 and 201021207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201021229) 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, 4023 + ... + 20450.

It is an arithmetic number, because the mean of its divisors is an integer number (17217459).

Almost surely, 2^201021222 is an apocalyptic number.

201021222 is an abundant number, since it is smaller than the sum of its proper divisors (212197794).

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

201021222 is a wasteful number, since it uses less digits than its factorization.

201021222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24552 (or 24515 counting only the distinct ones).

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

The square root of 201021222 is about 14178.1953012363. The cubic root of 201021222 is about 585.7972153787.

Adding to 201021222 its reverse (222120102), we get a palindrome (423141324).

It can be divided in two parts, 2010 and 21222, that added together give a palindrome (23232).

The spelling of 201021222 in words is "two hundred one million, twenty-one thousand, two hundred twenty-two".