201221022 has 32 divisors (see below), whose sum is σ = 415144224. Its totient is φ = 64972800.

The previous prime is 201221017. The next prime is 201221099. The reversal of 201221022 is 220122102.

It is a junction number, because it is equal to n+sod(n) for n = 201220989 and 201221007.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51622 + ... + 55382.

It is an arithmetic number, because the mean of its divisors is an integer number (12973257).

Almost surely, 2^201221022 is an apocalyptic number.

201221022 is an abundant number, since it is smaller than the sum of its proper divisors (213923202).

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

201221022 is a wasteful number, since it uses less digits than its factorization.

201221022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4044.

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

The square root of 201221022 is about 14185.2395820444. The cubic root of 201221022 is about 585.9912305956.

Adding to 201221022 its reverse (220122102), we get a palindrome (421343124).

It can be divided in two parts, 20122102 and 2, that multiplied together give a palindrome (40244204).

The spelling of 201221022 in words is "two hundred one million, two hundred twenty-one thousand, twenty-two".