201221130 has 64 divisors (see below), whose sum is σ = 529296768. Its totient is φ = 48552960.

The previous prime is 201221113. The next prime is 201221143. The reversal of 201221130 is 31122102.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75582 + ... + 78198.

It is an arithmetic number, because the mean of its divisors is an integer number (8270262).

Almost surely, 2^201221130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201221130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264648384).

201221130 is an abundant number, since it is smaller than the sum of its proper divisors (328075638).

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

201221130 is a wasteful number, since it uses less digits than its factorization.

201221130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2871.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 201221130 is about 14185.2433888178. The cubic root of 201221130 is about 585.9913354339.

Adding to 201221130 its reverse (31122102), we get a palindrome (232343232).

The spelling of 201221130 in words is "two hundred one million, two hundred twenty-one thousand, one hundred thirty".