221012030 has 16 divisors (see below), whose sum is σ = 398545920. Its totient is φ = 88243872.

The previous prime is 221011993. The next prime is 221012039. The reversal of 221012030 is 30210122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221012039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14270 + ... + 25409.

It is an arithmetic number, because the mean of its divisors is an integer number (24909120).

Almost surely, 2^221012030 is an apocalyptic number.

221012030 is a deficient number, since it is larger than the sum of its proper divisors (177533890).

221012030 is a wasteful number, since it uses less digits than its factorization.

221012030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40243.

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

The square root of 221012030 is about 14866.4733544980. The cubic root of 221012030 is about 604.6053296438.

Adding to 221012030 its reverse (30210122), we get a palindrome (251222152).

The spelling of 221012030 in words is "two hundred twenty-one million, twelve thousand, thirty".