201021122 has 16 divisors (see below), whose sum is σ = 306190392. Its totient is φ = 98962560.

The previous prime is 201021113. The next prime is 201021133. The reversal of 201021122 is 221120102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 194574601 + 6446521 = 13949^2 + 2539^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144872 + ... + 146252.

Almost surely, 2^201021122 is an apocalyptic number.

201021122 is a deficient number, since it is larger than the sum of its proper divisors (105169270).

201021122 is a wasteful number, since it uses less digits than its factorization.

201021122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2453.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 201021122 is about 14178.1917746940. The cubic root of 201021122 is about 585.7971182418.

Adding to 201021122 its reverse (221120102), we get a palindrome (422141224).

It can be divided in two parts, 2010 and 21122, that added together give a palindrome (23132).

The spelling of 201021122 in words is "two hundred one million, twenty-one thousand, one hundred twenty-two".