201221122 has 4 divisors (see below), whose sum is σ = 301831686. Its totient is φ = 100610560.

The previous prime is 201221113. The next prime is 201221143. The reversal of 201221122 is 221122102.

It is a happy number.

201221122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 194351481 + 6869641 = 13941^2 + 2621^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50305279 + ... + 50305282.

Almost surely, 2^201221122 is an apocalyptic number.

201221122 is a deficient number, since it is larger than the sum of its proper divisors (100610564).

201221122 is a wasteful number, since it uses less digits than its factorization.

201221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100610563.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 201221122 is about 14185.2431068347. The cubic root of 201221122 is about 585.9913276681.

Adding to 201221122 its reverse (221122102), we get a palindrome (422343224).

The spelling of 201221122 in words is "two hundred one million, two hundred twenty-one thousand, one hundred twenty-two".