201221030 has 16 divisors (see below), whose sum is σ = 371032704. Its totient is φ = 78525120.

The previous prime is 201221017. The next prime is 201221099. The reversal of 201221030 is 30122102.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244982 + ... + 245801.

It is an arithmetic number, because the mean of its divisors is an integer number (23189544).

Almost surely, 2^201221030 is an apocalyptic number.

201221030 is a deficient number, since it is larger than the sum of its proper divisors (169811674).

201221030 is a wasteful number, since it uses less digits than its factorization.

201221030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490831.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 201221030 is about 14185.2398640277. The cubic root of 201221030 is about 585.9912383614.

Adding to 201221030 its reverse (30122102), we get a palindrome (231343132).

The spelling of 201221030 in words is "two hundred one million, two hundred twenty-one thousand, thirty".